Question

If f(x) = x2 – 2x and g(x) = 6x + 4, for which value of x does (f + g)(x) = 0?

-4
-2
2
4

Answer 1

-2 B

Explanation:

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Answer 2

Answer is - 2.

Explanation:

(f+g) (x)=f(x) +g(x)=x^2 -2x +6x+4

=x^2 +4x+4=0

If x=-4, then (f+g) (-4) =16-16+4=4

if x=-2, then (f+g) (-2)=4-8+4=0