Michigan State University - Diagnostic Exam

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1.7

  •   Which of the following is equivalent to 5x2 - 45?



    a) 5(x - 3)2 b) 5(x + 3)2 c) -5(x2 - 9)
       
    d) (5x + 9)(x + 5) e) 5(x - 3)(x + 3)

Solution:
5x2 - 45 = 5(x2 - 9) = 5(x - 3)(x + 3)

Diagnostic:

If you miss this question please review difference of two squares.

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July 15, 2008