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Choosing Your Own Method to Factor Trinomials

6.5.5 Choosing Your Own Method to Factor Trinomials

6.5.5 • Choosing Your Own Method to Factor Trinomials

Cool Down

Work with a partner. For each trinomial, explain which method you would use to factor. When you have discussed your reasoning, factor the trinomial and compare solutions.

1.

x 2 − 14 x − 32 x 2 − 14 x − 32

Compare your answer:

trial and error; for example, (x−16)(x+2)(x−16)(x+2)

2.

6 r 2 + 30 r + 36 6 r 2 + 30 r + 36

Compare your answer:

the “acac” method; for example, 6(r+3)(r+2)6(r+3)(r+2)

3.

( x + 3 ) 2 − 9 ( x + 3 ) − 36 ( x + 3 ) 2 − 9 ( x + 3 ) − 36

Compare your answer:

substitution; for example, (x−9)(x+6)(x−9)(x+6)