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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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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)

User Ivan Olshansky
by
7.4k points

1 Answer

1 vote
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
User GeertvdC
by
7.3k points
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