Chapter 9

Chapter 9

Be Prepared

9.1

ⓐ 8181 ⓑ 8181 ⓒ −81−81

9.2

3.85 3.85

9.3

ⓐ −100−100 ⓑ −100−100.

9.4

5 11 5 11

9.5

n 6 n 6

9.6

1 q 8 1 q 8

9.7

ⓐ 12x12x ⓑ 5m+5n5m+5n

9.8

5 x 2 x 5 x 2 x

9.9

24 u v 24 u v

9.10

72 − 42 n 72 − 42 n

9.11

8 + 2 a + a 2 8 + 2 a + a 2

9.12

30 48 30 48

9.13

5 5

9.14

49 − 9 x 2 49 − 9 x 2

9.15

ⓐ 33 ⓑ 8181

9.16

22 22

9.17

n = 2   or   n = 4 n = 2   or   n = 4

9.18

y 9 y 9

9.19

n 12 n 12

9.20

x 5 x 5

9.21

53 60 53 60

9.22

64 x 6 y 15 64 x 6 y 15

9.23

1 125 1 125

Try It

9.1

ⓐ −7−7 ⓑ 1515

9.2

ⓐ 88 ⓑ −11−11

9.3

ⓐ not a real number ⓑ −9−9

9.4

ⓐ −7−7 ⓑ not a real number

9.5

ⓐ 7 ⓑ 5

9.6

ⓐ 17 ⓑ 2323

9.7

6 < 38 < 7 6 < 38 < 7

9.8

9 < 84 < 10 9 < 84 < 10

9.9

≈ 3.32 ≈ 3.32

9.10

≈ 3.61 ≈ 3.61

9.11

ⓐ y4y4 ⓑ z6z6

9.12

ⓐ m2m2 ⓑ b5b5

9.13

8 x 8 x

9.14

13 y 13 y

9.15

−11 y −11 y

9.16

−10 p −10 p

9.17

10 a b 10 a b

9.18

15 m n 15 m n

9.19

7 x 15 7 x 15

9.20

9 w 18 9 w 18

9.21

13 x 5 y 7 13 x 5 y 7

9.22

12 p 6 q 10 12 p 6 q 10

9.23

4 3 4 3

9.24

3 5 3 5

9.25

12 2 12 2

9.26

12 3 12 3

9.27

b 2 b b 2 b

9.28

p 4 p p 4 p

9.29

4 x 3 x 4 x 3 x

9.30

7 v 4 v 7 v 4 v

9.31

4 y 2 2 y 4 y 2 2 y

9.32

5 a 4 3 a 5 a 4 3 a

9.33

7 a 3 b 2 2 a b 7 a 3 b 2 2 a b

9.34

6 m 4 n 5 5 m n 6 m 4 n 5 5 m n

9.35

5 + 5 3 5 + 5 3

9.36

2 + 7 2 2 + 7 2

9.37

2 − 3 2 − 3

9.38

2 − 5 2 − 5

9.39

5 4 5 4

9.40

7 9 7 9

9.41

5 4 5 4

9.42

7 9 7 9

9.43

a a

9.44

x 2 x 2

9.45

5 x 2 5 x 2

9.46

6 z 6 z

9.47

19 7 19 7

9.48

2 7 9 2 7 9

9.49

2 p 6 p 7 2 p 6 p 7

9.50

2 x 2 3 x 5 2 x 2 3 x 5

9.51

4 m 5 m n 3 4 m 5 m n 3

9.52

3 u 3 6 u v 4 3 u 3 6 u v 4

9.53

8 x 2 3 8 x 2 3

9.54

2 a 2 5 2 a 2 5

9.55

5 y x 6 5 y x 6

9.56

4 m 3 5 n 3 5 n 4 m 3 5 n 3 5 n

9.57

− 2 − 2

9.58

−4 3 −4 3

9.59

9 x 9 x

9.60

8 u 8 u

9.61

7 p − 6 q 7 p − 6 q

9.62

6 a − 3 b 6 a − 3 b

9.63

9 11 9 11

9.64

11 10 11 10

9.65

5 + 2 6 5 + 2 6

9.66

−5 7 + 2 5 −5 7 + 2 5

9.67

−2 7 x −2 7 x

9.68

− 3 y − 3 y

9.69

−2 5 x y −2 5 x y

9.70

0 0

9.71

9 2 9 2

9.72

7 3 7 3

9.73

2 2

9.74

− 5 − 5

9.75

6 3 6 3

9.76

−15 5 −15 5

9.77

− 3 − 3

9.78

0 0

9.79

14 15 2 14 15 2

9.80

1 12 5 1 12 5

9.81

− m 3 2 m − m 3 2 m

9.82

− p 3 p − p 3 p

9.83

20 x 2 − 12 x 3 20 x 2 − 12 x 3

9.84

28 y 3 − 24 y 2 28 y 3 − 24 y 2

9.85

10 x 3 10 x 3

9.86

−5 x 2 −5 x 2

9.87

ⓐ 3232 ⓑ 362362

9.88

ⓐ 5252 ⓑ 902902

9.89

12 15 12 15

9.90

27 2 27 2

9.91

ⓐ 3x223x22 ⓑ 10y2y10y2y

9.92

ⓐ 2x332x33 ⓑ 6y3y6y3y

9.93

144 x 3 10 144 x 3 10

9.94

144 y 2 5 y 144 y 2 5 y

9.95

ⓐ 12 ⓑ 1515

9.96

ⓐ 16 ⓑ 20

9.97

ⓐ 330 ⓑ 200

9.98

ⓐ 210 ⓑ 96

9.99

ⓐ 6−256−25 ⓑ 23−3623−36

9.100

ⓐ 12+6612+66 ⓑ 7+727+72

9.101

ⓐ 18+618+6 ⓑ 6+1226+122

9.102

ⓐ −40+42−40+42 ⓑ 27+14327+143

9.103

−3 + 2 6 −3 + 2 6

9.104

−2 + 2 10 −2 + 2 10

9.105

−66 + 15 7 −66 + 15 7

9.106

41 − 14 11 41 − 14 11

9.107

1 + 9 21 1 + 9 21

9.108

−12 − 20 3 −12 − 20 3

9.109

12 + 8 m − 15 m 12 + 8 m − 15 m

9.110

10 − 47 n − 15 n 10 − 47 n − 15 n

9.111

ⓐ 102+202102+202 ⓑ 55+6655+66

9.112

ⓐ 41−12541−125 ⓑ 121−3610121−3610

9.113

4 + 20 m + 25 m 4 + 20 m + 25 m

9.114

9 − 24 n + 16 n 9 − 24 n + 16 n

9.115

1 1

9.116

−4 −4

9.117

−11 −11

9.118

−159 −159

9.119

2 2 2 2

9.120

3 3 3 3

9.121

4 − 10 5 4 − 10 5

9.122

2 − 3 4 2 − 3 4

9.123

2 3 2 3

9.124

4 3 4 3

9.125

r 2 r 2

9.126

p 2 7 p 2 7

9.127

5 s 8 5 s 8

9.128

5 q 2 6 5 q 2 6

9.129

9 x 2 y 2 9 x 2 y 2

9.130

10 n 3 m 10 n 3 m

9.131

5 3 3 5 3 3

9.132

6 5 5 6 5 5

9.133

5 2 5 2

9.134

− 3 3 4 − 3 3 4

9.135

14 6 14 6

9.136

6 8 6 8

9.137

1 3 1 3

9.138

5 5 5 5

9.139

2 ( 2 − 3 ) 1 2 ( 2 − 3 ) 1

9.140

5 ( 5 − 3 ) 22 5 ( 5 − 3 ) 22

9.141

− 3 ( 1 + 5 ) 4 − 3 ( 1 + 5 ) 4

9.142

4 + 6 5 4 + 6 5

9.143

5 ( x − 2 ) x − 2 5 ( x − 2 ) x − 2

9.144

10 ( y + 3 ) y − 3 10 ( y + 3 ) y − 3

9.145

( p + 2 ) p − 2 2 ( p + 2 ) p − 2 2

9.146

( q − 10 ) q − 10 2 ( q − 10 ) q − 10 2

9.147

ⓐ no ⓑ yesyes

9.148

ⓐ no ⓑ yesyes

9.149

10 10

9.150

7 7

9.151

23 3 23 3

9.152

3 10 3 10

9.153

1 3 1 3

9.154

3 5 3 5

9.155

no solution no solution

9.156

no solution no solution

9.157

2 , 3 2 , 3

9.158

5 , 6 5 , 6

9.159

7 7

9.160

3 3

9.161

127 2 127 2

9.162

311 3 311 3

9.163

no solution

9.164

no solution

9.165

no solution no solution

9.166

no solution no solution

9.167

no solution no solution

9.168

no solution no solution

9.169

19.2 feet 19.2 feet

9.170

52.0 cm 52.0 cm

9.171

9 seconds 9 seconds

9.172

3.5 seconds 3.5 seconds

9.173

42.7 miles per hour 42.7 miles per hour

9.174

54.1 miles per hour 54.1 miles per hour

9.175

ⓐ 3 ⓑ 4 ⓒ 3

9.176

ⓐ 10 ⓑ 2 ⓒ 2

9.177

ⓐ −5−5 ⓑ not real ⓒ −2−2

9.178

ⓐ −6−6 ⓑ not real ⓒ −4−4

9.179

ⓐ |b||b| ⓑ ww ⓒ |m||m| ⓓ qq

9.180

ⓐ |y||y| ⓑ pp ⓒ |z||z| ⓓ qq

9.181

ⓐ u3u3 ⓑ v5v5

9.182

ⓐ c4c4 ⓑ d4d4

9.183

ⓐ 3x93x9 ⓑ 3|q7|3|q7|

9.184

ⓐ 5p35p3 ⓑ 3q53q5

9.185

ⓐ |y|y24|y|y24 ⓑ zz23zz23

9.186

ⓐ pp35pp35 ⓑ q2q6q2q6

9.187

ⓐ 333333 ⓑ 244244

9.188

ⓐ 553553 ⓑ 394394

9.189

ⓐ 3p32p33p32p3 ⓑ 2q24q242q24q24

9.190

ⓐ 4m32m234m32m23 ⓑ 3|n|2n343|n|2n34

9.191

ⓐ −343−343 ⓑ not realnot real

9.192

ⓐ −553−553 ⓑ not realnot real

9.193

ⓐ |x||x| ⓑ y3y3

9.194

ⓐ m2m2 ⓑ n2n2

9.195

ⓐ −2663−2663 ⓑ 3|m|2m243|m|2m24

9.196

ⓐ −4−4 ⓑ 3|n|243|n|24

9.197

ⓐ 3c34c3d23c34c3d2 ⓑ 2x2|y|5x2y42x2|y|5x2y4

9.198

ⓐ 2r5s32r5s3 ⓑ 3m32m24|n3|3m32m24|n3|

9.199

ⓐ 23x523x5 ⓑ 293293

9.200

ⓐ 210y4210y4 ⓑ 23262326

9.201

ⓐ 3333 ⓑ 624624

9.202

ⓐ −23−23 ⓑ 525525

9.203

ⓐ 2y4y23+3y24y232y4y23+3y24y23 ⓑ 3r23r34+4r23r243r23r34+4r23r24

9.204

ⓐ 2z25z3+3z5z32z25z3+3z5z3 ⓑ 2|s3|5s4+4|s|5s242|s3|5s4+4|s|5s24

9.205

ⓐ tt ⓑ m3m3 ⓒ r4r4

9.206

ⓐ bb ⓑ z3z3 ⓒ p4p4

9.207

ⓐ s12s12 ⓑ x13x13 ⓒ b14b14

9.208

ⓐ v12v12 ⓑ p13p13 ⓒ p14p14

9.209

ⓐ (10m)12(10m)12 ⓑ (3n)15(3n)15 ⓒ (486y)14(486y)14

9.210

ⓐ (3k)17(3k)17 ⓑ (5j)14(5j)14 ⓒ (1024a)13(1024a)13

9.211

ⓐ 6 ⓑ 2 ⓒ 2

9.212

ⓐ 10 ⓑ 3 ⓒ 3

9.213

ⓐ −5−5 ⓑ −5−5 ⓒ 1515

9.214

ⓐ −2−2 ⓑ −2−2 ⓒ 1212

9.215

ⓐ not real ⓑ −8−8 ⓒ 1818

9.216

ⓐ not real ⓑ −4−4 ⓒ 1414

9.217

ⓐ x52x52 ⓑ z34z34 ⓒ y25y25

9.218

ⓐ a25a25 ⓑ b73b73 ⓒ m54m54

9.219

ⓐ 8 ⓑ 9 ⓒ 125

9.220

ⓐ 32 ⓑ 729 ⓒ 8

9.221

ⓐ 132132 ⓑ 17291729 ⓒ 1818

9.222

ⓐ 1818 ⓑ 1919 ⓒ 11251125

9.223

ⓐ −64−64 ⓑ −164−164 ⓒ not a real number

9.224

ⓐ −729−729 ⓑ −1729−1729 ⓒ not a real number

9.225

ⓐ 9 ⓑ y3y3 ⓒ m

9.226

ⓐ 25 ⓑ z ⓒ n

9.227

ⓐ p2p2 ⓑ q6q6 ⓒ x8x8

9.228

ⓐ r10r10 ⓑ s9s9 ⓒ m2m2

9.229

ⓐ u ⓑ v15v15 ⓒ 1x1x

9.230

ⓐ c2c2 ⓑ 1m1m ⓒ 1d1d

9.231

ⓐ 8x158x15 ⓑ 4y294y29

9.232

ⓐ 64m1264m12 ⓑ 729n35729n35

9.233

ⓐ m2m2 ⓑ n3n3

9.234

ⓐ u3u3 ⓑ v5v5

Section 9.1 Exercises

1.

6

3.

8

5.

3

7.

10

9.

−2 −2

11.

−1 −1

13.

not a real number

15.

not a real number

17.

5

19.

7

21.

8 < 70 < 9 8 < 70 < 9

23.

14 < 200 < 15 14 < 200 < 15

25.

4.36

27.

7.28

29.

y y

31.

a 7 a 7

33.

7 x 7 x

35.

11 m 10 11 m 10

37.

9 x 18 9 x 18

39.

−9 x 9 −9 x 9

41.

−8 a −8 a

43.

12 x y 12 x y

45.

13 w 4 y 5 13 w 4 y 5

47.

3 c 4 d 6 3 c 4 d 6

49.

25 centimeters

51.

Answers will vary.

Section 9.2 Exercises

53.

3 3 3 3

55.

5 5 5 5

57.

10 2 10 2

59.

15 2 15 2

61.

20 2 20 2

63.

15 3 15 3

65.

x 3 x x 3 x

67.

p p p p

69.

m 6 m m 6 m

71.

r 12 r r 12 r

73.

7 n 8 n 7 n 8 n

75.

9 r 7 r 9 r 7 r

77.

7 m 2 2 m 7 m 2 2 m

79.

5 r 6 5 r 5 r 6 5 r

81.

10 p 6 2 p 10 p 6 2 p

83.

11 m 11 2 m 11 m 11 2 m

85.

7 m 3 n 5 3 m n 7 m 3 n 5 3 m n

87.

5 r 6 s 4 3 r s 5 r 6 s 4 3 r s

89.

10 p 4 q 5 3 p q 10 p 4 q 5 3 p q

91.

11 m 6 n 10 2 m n 11 m 6 n 10 2 m n

93.

5 + 2 3 5 + 2 3

95.

1 + 3 5 1 + 3 5

97.

5 − 6 5 − 6

99.

1 + 10 1 + 10

101.

7 8 7 8

103.

11 4 11 4

105.

6 7 6 7

107.

3 5 3 5

109.

x 2 x 2

111.

1 y 2 1 y 2

113.

10 x 2 10 x 2

115.

4 p 4 4 p 4

117.

6 35 6 35

119.

2 5 9 2 5 9

121.

4 x 3 6 x 11 4 x 3 6 x 11

123.

5 m 2 3 m 4 5 m 2 3 m 4

125.

7 r 2 2 r 10 7 r 2 2 r 10

127.

2 q 3 7 15 2 q 3 7 15

129.

5 r 4 3 r s 4 5 r 4 3 r s 4

131.

2 p 3 7 p q 2 p 3 7 p q

133.

5 x 3 5 x 3

135.

11 p p 9 11 p p 9

137.

4 x y 3 4 x y 3

139.

1 2 p q p 1 2 p q p

141.

ⓐ 17.0feet17.0feet ⓑ 12.0feet12.0feet

143.

Answers will vary.

Section 9.3 Exercises

145.

3 2 3 2

147.

9 5 9 5

149.

− 7 − 7

151.

9 y 9 y

153.

−3 a −3 a

155.

7 c 7 c

157.

8 a − 2 b 8 a − 2 b

159.

5 m + n 5 m + n

161.

13 7 13 7

163.

−3 11 −3 11

165.

−5 3 + 7 5 −5 3 + 7 5

167.

8 2 − 3 5 8 2 − 3 5

169.

4 2 a 4 2 a

171.

3 c 3 c

173.

4 3 a b 4 3 a b

175.

p q p q

177.

9 2 9 2

179.

5 5

181.

−2 3 −2 3

183.

7 3 7 3

185.

−8 2 −8 2

187.

16 3 16 3

189.

5 2 5 2

191.

− 5 − 5

193.

− 3 − 3

195.

− 11 12 2 − 11 12 2

197.

a 2 2 a a 2 2 a

199.

2 c 3 5 c 2 c 3 5 c

201.

36 p 2 5 − 42 p 2 2 36 p 2 5 − 42 p 2 2

203.

10 r 4 2 + 12 r 4 6 10 r 4 2 + 12 r 4 6

205.

14 x 5 14 x 5

207.

4 y 2 4 y 2

209.

6 2 6 2

211.

2 k 2 7 2 k 2 7

213.

2 3 2 3

215.

2 2

217.

13 13

219.

a 2 5 a a 2 5 a

221.

19 19 19 19

223.

5 3 5 3

225.

− 3 − 3

227.

8 x 6 8 x 6

229.

124.5 inches 124.5 inches

231.

Answers will vary.

Section 9.4 Exercises

233.

ⓐ 44 ⓑ 186186

235.

ⓐ 7272 ⓑ 160

237.

30 3 30 3

239.

−18 6 −18 6

241.

−30 2 −30 2

243.

28 2 28 2

245.

ⓐ 5y235y23 ⓑ 6n2n6n2n

247.

ⓐ 8y328y32 ⓑ 11s3s11s3s

249.

40 b 2 3 40 b 2 3

251.

150 d 5 150 d 5

253.

54 y 4 y 54 y 4 y

255.

−96 k 5 k −96 k 5 k

257.

ⓐ 11 ⓑ 21

259.

ⓐ 23 ⓑ 3

261.

ⓐ −234 ⓑ 180

263.

ⓐ 10521052 ⓑ 56

265.

ⓐ 24−41124−411 ⓑ 52−2652−26

267.

ⓐ −14−711−14−711 ⓑ 67−7267−72

269.

ⓐ 44+81144+811 ⓑ 1515

271.

ⓐ 18−5218−52 ⓑ 21−7321−73

273.

60 + 2 3 60 + 2 3

275.

52 + 3 2 52 + 3 2

277.

27 − 9 7 27 − 9 7

279.

−62 + 55 5 −62 + 55 5

281.

41 + 7 55 41 + 7 55

283.

−81 + 44 78 −81 + 44 78

285.

18 + 7 w − w 18 + 7 w − w

287.

66 + 73 n + 15 n 66 + 73 n + 15 n

289.

ⓐ 27+81127+811 ⓑ 29−12529−125

291.

ⓐ 35−101035−1010 ⓑ 82+48282+482

293.

97

295.

39

297.

−127 −127

299.

33

301.

−24 3 −24 3

303.

−210 3 −210 3

305.

7 y 3 5 7 y 3 5

307.

29 29

309.

29 − 7 17 29 − 7 17

311.

ⓐ 4.6feet4.6feet ⓑ 21sq. feet21sq. feet

313.

31.9squareyards31.9squareyards

315.

ⓐ when squaring a negative, it becomes a positive ⓑ since the negative is not included in the parenthesis, it is not squared, and remains negative

Section 9.5 Exercises

317.

3 2 3 2

319.

2 2 3 2 2 3

321.

1 − 2 2 4 1 − 2 2 4

323.

2 + 5 2 2 + 5 2

325.

4 5 4 5

327.

4 3 4 3

329.

ⓐ 2x22x2 ⓑ 10m2710m27

331.

5 r 6 5 r 6

333.

6 p 102 q 2 6 p 102 q 2

335.

8 n 3 m 3 8 n 3 m 3

337.

2 2 2 2

339.

1 + 5 3 1 + 5 3

341.

4 5 4 5

343.

y 3 13 y 3 13

345.

5 6 3 5 6 3

347.

6 7 7 6 7 7

349.

3 13 13 3 13 13

351.

10 3 10 3

353.

4 5 45 4 5 45

355.

− 3 3 2 − 3 3 2

357.

15 10 15 10

359.

70 20 70 20

361.

133 35 133 35

363.

ⓐ 3(3−11)−23(3−11)−2 ⓑ −2(1+5)−2(1+5)

365.

ⓐ 5(5−6)195(5−6)19 ⓑ 3(3+7)3(3+7)

367.

3 ( m + 5 ) m − 5 3 ( m + 5 ) m − 5

369.

2 ( x + 6 ) x − 6 2 ( x + 6 ) x − 6

371.

( r + 5 ) r − 5 2 ( r + 5 ) r − 5 2

373.

5 y 2 x 5 y 2 x

375.

3 5 3 5

377.

2 3 9 2 3 9

379.

3 ( 5 − 5 ) 20 3 ( 5 − 5 ) 20

381.

2 ( x + 3 ) x − 3 2 ( x + 3 ) x − 3

383.

( x + 2 2 ) x − 8 2 ( x + 2 2 ) x − 8 2

385.

5 10 4 seconds 5 10 4 seconds

387.

Answers will vary.

Section 9.6 Exercises

389.

ⓐ yesyes ⓑ nono

391.

ⓐ no ⓑ yes

393.

3

395.

14

397.

14

399.

17 17

401.

13 5 13 5

403.

5 2 5 2

405.

no solution no solution

407.

no solution no solution

409.

ⓐ 10,1110,11 ⓑ 55

411.

ⓐ 8,98,9 ⓑ 1111

413.

3 3

415.

5 5

417.

not a real number

419.

1 4 1 4

421.

ⓐ no solutionno solution ⓑ 57165716

423.

ⓐ no solutionno solution ⓑ 6

425.

no solution

427.

36

429.

15

431.

11.4 feet 11.4 feet

433.

8 seconds 8 seconds

435.

15.8 seconds 15.8 seconds

437.

72 miles per hour 72 miles per hour

439.

53.0 miles per hour 53.0 miles per hour

441.

Answers will vary.

Section 9.7 Exercises

443.

ⓐ 33 ⓑ 22 ⓒ 33

445.

ⓐ 55 ⓑ 66 ⓒ 44

447.

ⓐ −4−4 ⓑ not realnot real ⓒ −3−3

449.

ⓐ −8−8 ⓑ not a real number ⓒ −1−1

451.

ⓐ aa ⓑ |b||b|

453.

ⓐ |k||k| ⓑ |p||p|

455.

ⓐ a2a2 ⓑ b9b9

457.

ⓐ r2r2 ⓑ s10s10

459.

ⓐ −2c3−2c3 ⓑ 5d55d5

461.

ⓐ 2r22r2 ⓑ 3s63s6

463.

ⓐ uu25uu25 ⓑ vv56vv56

465.

ⓐ pp35pp35 ⓑ q2q23q2q23

467.

ⓐ 553553 ⓑ 226226

469.

ⓐ 554554 ⓑ 333333

471.

ⓐ 2a3a252a3a25 ⓑ 5b3b35b3b3

473.

ⓐ 8pp238pp23 ⓑ 3q4q343q4q34

475.

ⓐ −325−325 ⓑ not realnot real

477.

ⓐ −2−2 ⓑ not realnot real

479.

ⓐ dd ⓑ |m||m|

481.

ⓐ r3r3 ⓑ |c3||c3|

483.

ⓐ −5−5 ⓑ 2mm242mm24

485.

ⓐ 363363 ⓑ 2|r|2r342|r|2r34

487.

ⓐ 2r23rs352r23rs35 ⓑ 2u2uv362u2uv36

489.

ⓐ 5u35u3v5u35u3v ⓑ 3c59c4d23c59c4d2

491.

ⓐ 215q3215q3 ⓑ −4274−4274

493.

ⓐ

The image displays the mathematical expression 42 times the 12th root of 4y.

ⓑ

The image shows the mathematical expression 14 times the 10th root of 5z.
495.

ⓐ 223223 ⓑ −234−234

497.

ⓐ 334+524334+524 ⓑ 13231323

499.

ⓐ 2b10b23+3b1032b10b23+3b103 ⓑ 2v210v24−45v342v210v24−45v34

501.

2 2

503.

| b | | b |

505.

5 d 5 5 d 5

507.

s 2 s 2 4 s 2 s 2 4

509.

2 y 3 y 2 4 2 y 3 y 2 4

511.

not real not real

513.

2 x 2 x 5 2 x 2 x 5

515.

2 u 2 u v 3 6 2 u 2 u v 3 6

517.

2 2 4 2 2 4

519.

3 │ u │ 6 u 3 4 + 4 3 u 3 4 3 │ u │ 6 u 3 4 + 4 3 u 3 4

521.

5 5

523.

Answers may vary.

Section 9.8 Exercises

525.

ⓐ rr ⓑ s3s3 ⓒ t4t4

527.

ⓐ g7g7 ⓑ h5h5 ⓒ j25j25

529.

ⓐ r18r18 ⓑ s110s110 ⓒ t14t14

531.

ⓐ u15u15 ⓑ v12v12 ⓒ w116w116

533.

ⓐ (5x)14(5x)14 ⓑ (9y)18(9y)18 ⓒ 7(3z)157(3z)15

535.

ⓐ (25a)13(25a)13 ⓑ (3b)12(3b)12 ⓒ (40c)110(40c)110

537.

ⓐ 5 ⓑ 3 ⓒ 2

539.

ⓐ 6 ⓑ 2 ⓒ 3

541.

ⓐ −3−3 ⓑ −3−3 ⓒ 1313

543.

ⓐ −10−10 ⓑ −10−10 ⓒ 110110

545.

ⓐ not a real number ⓑ −7−7 ⓒ 1717

547.

ⓐ not a real number ⓑ 11 ⓒ −1−1

549.

ⓐ −2−2 ⓑ 1313
ⓒ −5−5

551.

ⓐ r74r74 ⓑ s35s35 ⓒ t73t73

553.

ⓐ a13a13 ⓑ b52b52 ⓒ c53c53

555.

ⓐ 100 ⓑ 125 ⓒ 8

557.

ⓐ 64 ⓑ 3125 ⓒ 256

559.

ⓐ 32,768 ⓑ 17291729 ⓒ 181181

561.

ⓐ 1000 ⓑ 116,807116,807 ⓒ not a real number

563.

ⓐ −512−512
ⓑ −1512−1512 ⓒ not a real number

565.

ⓐ −343−343 ⓑ −1343−1343 ⓒ not a real number

567.

ⓐ 216 ⓑ nn ⓒ q3q3

569.

ⓐ 100 ⓑ x2x2 ⓒ y4y4

571.

ⓐ a2a2 ⓑ b9b9
ⓒ cc

573.

ⓐ h8h8 ⓑ k9k9 ⓒ j14j14

575.

ⓐ ss ⓑ z2z2 ⓒ 1w1w

577.

ⓐ uu ⓑ rr ⓒ 1n1n

579.

ⓐ 3r153r15 ⓑ 2s1142s114

581.

ⓐ 9m129m12 ⓑ 125n2125n2

583.

ⓐ r2sr2s ⓑ u3v4u3v4

585.

ⓐ r8s5r8s5 ⓑ u8v4u8v4

587.

ⓐ a3a3 ⓑ b4b4

589.

ⓐ mm ⓑ n2n2

591.

n n

593.

b 6 b 6

595.

1 z 2 1 z 2

597.

2 s 1 10 2 s 1 10

599.

u 2 v 3 u 2 v 3

601.

15.6 feet

603.

8 seconds

605.

Answers will vary.

Review Exercises

607.

12

609.

−9 −9

611.

not a real number

613.

17

615.

12 < 155 < 13 12 < 155 < 13

617.

7.55

619.

8 b 8 b

621.

15 m n 15 m n

623.

7 y 7 y

625.

11 c d 11 c d

627.

7 2 7 2

629.

y 9 y y 9 y

631.

6 n 6 n 6 n 6 n

633.

5 n 3 6 n 5 n 3 6 n

635.

6 r 2 s 3 r s 6 r 2 s 3 r s

637.

1 + 2 1 + 2

639.

3 2 3 2

641.

y 2 y 2

643.

6 q 2 6 q 2

645.

26 13 26 13

647.

3 r 2 r 2 3 r 2 r 2

649.

2 r s 3 r 5 2 r s 3 r 5

651.

12 5 12 5

653.

4 m 4 m

655.

11 13 + 2 3 11 13 + 2 3

657.

3 3 r s − 5 r s 3 3 r s − 5 r s

659.

5 2 5 2

661.

9 3 9 3

663.

0 0

665.

17 n 2 2 17 n 2 2

667.

24 7 24 7

669.

180 y 2 180 y 2

671.

8

673.

50

675.

20 − 10 7 20 − 10 7

677.

13 − 2 2 13 − 2 2

679.

5 − 13 x − 6 x 5 − 13 x − 6 x

681.

1 + 12 p + 36 p 1 + 12 p + 36 p

683.

−19 −19

685.

3 2 3 2

687.

4 3 4 3

689.

y 2 10 y 2 10

691.

2 15 3 2 15 3

693.

5 3 5 3

695.

21 14 21 14

697.

16 − 12 3 −11 16 − 12 3 −11

699.

−8 − 4 5 −8 − 4 5

701.

2 p − 6 p − 3 2 p − 6 p − 3

703.

5

705.

7 2 7 2

707.

4 and 5

709.

13

711.

43 2 43 2

713.

0

715.

1 16 1 16

717.

11

719.

7.5 seconds

721.

ⓐ 2 ⓑ 4

723.

ⓐ dd ⓑ |v||v|

725.

ⓐ 2x22x2 ⓑ 2y22y2

727.

ⓐ dd ⓑ mm611mm611

729.

ⓐ 2c2c352c2c35 ⓑ 2d3d342d3d34

731.

ⓐ −543−543 ⓑ not a real number

733.

w 3 w 3 w 3 w 3

735.

3 z 2 3 z 2

737.

2 20 5 2 20 5

739.

2 2 4 2 2 4

741.

2 t 3 t 3 5 + 3 2 t 4 5 2 t 3 t 3 5 + 3 2 t 4 5

743.
A close-up image showing a mathematical expression: the square root of nineteen divided by S. It appears to be a variable or a value S under the radical symbol, with 19 also inside.
745.

v 1 6 v 1 6

747.

( 10 z ) 1 6 ( 10 z ) 1 6

749.

2

751.

1 5 1 5

753.

1 6 1 6

755.

n 8 5 n 8 5

757.

32,768

759.

1 59,049 1 59,049

761.

x 8 x 8

763.

2 s 9 16 2 s 9 16

765.

z 2 z 2

Practice Test

767.

13 m 2 | n | 13 m 2 | n |

769.

4 13 + 5 2 4 13 + 5 2

771.

60 y 2 3 60 y 2 3

773.

1 − 4 q + 4 q 1 − 4 q + 4 q

775.

ⓐ 3x33x3 ⓑ 2y32y3

777.

y 2 y 2

779.

0 0

781.

343

783.

1 w 1 w

785.

6 4 6 4

787.

42

789.

6.1 seconds