Michigan State University - Diagnostic Exam

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1.9

  •   Which of the following is equivalent to x2 + 2x - 35?

    a) (x - 2)(x + 5) b) (x - 7)(x - 5) c) (x + 7)(x + 5)
       
    d) (x - 7)(x + 5) e) (x + 7)(x - 5)

Solution:
2 2 x + 2x - 35 = x + 7◟x--◝◜5x◞ - 35 2x = x(x + 7) - 5(x + 7) = (x + 7)(x - 5)

Diagnostic:

If you miss this question please review factoring quadratic trinomials.

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July 15, 2008