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

Explanation:

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

(f + g)(x) = 0

x^2 - 2x + 6x + 4 = 0

x^2 + 4x + 4 = 0

(x + 2)^2 = 0

√(x + 2)^2 = √0

x + 2 = 0

x = -2

Answer 2

The answer is second one (-2)