If (x+k) is a favor of f(x) which of the following must be true? A) f(k)=0 B) f(-k)=0 C) a root of f(x) is x=k D) a y-intercept of f(x) is x=-k

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asked Jul 2, 2019 137k views

1 Answer

Darryl Mendonez · Answer 1 · 2019-07-07T18:25:17+0000

Answer:

B

Explanation:

A factor of f(x) has the form (x+k). We know to find the zeros or roots of the function we set the factors equal to 0.

So (x+k)=0 and solve for x. x=-k. This means f(-k)=0.