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Practice

7.9.5 Practice

7.9.5 • Practice

Complete the following questions to practice the skills you have learned in this lesson.

  1. Choose the standard form of the quadratic expression.
      1. ( x + 4 ) ( x − 1 )
  1. − x 2 − 3 x + 4
  2. x 2 + 3 x − 4
  3. − x 2 + 3 x − 4
  4. x 2 − 3 x + 4
    1. ( 2 x − 1 ) ( 3 x − 1 )
  1. − 6 x 2 + 5 x − 1
  2. − 6 x 2 − 5 x + 1
  3. 6 x 2 − 5 x + 1
  4. 6 x 2 + 5 x − 1
  1. Consider the expression 8 − 6 x + x 2 .
    1. Is the expression in standard form?
  1. Yes
  2. No
    1. Is the expression equivalent to ( x − 4 ) ( x − 2 ) ?
  1. Yes
  2. No
  1. Find the standard form of the quadratic expression ( x − 2 ) ( x + 8 ) . Use the standard form to answer questions a, b, and c.
    1. What is the value of a in this expression a x 2 + b x + c ?
    1. What is the value of b in this expression a x 2 + b x + c ?
    1. What is the value of c in this expression a x 2 + b x + c ?