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11 May, 14:26

Which of the following functions has a zero at x=-2

A. f (x) = (x+2) ^2 - 5

B. f (x) = x^2 - 6x+8

C. f (x) = (x-2) ^2 + 1

D. f (x) = x (x+2)

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Answers (1)
  1. 11 May, 17:12
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    Plug in - 2 for x for every function and set every function to 0. If it equals 0 then there's a "zero" at x=-2

    Example A: 0 = (-2+2) ^2 - 5 = 0 - 5 = - 5 < - - This does not = 0 so it's not the answer
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