Question

If f(x) = 5 - 2x and g(x) = -4x + 2, find g(f(x))

Answer 1

g(f(x)) = 8x-18

Explanation:

Given that,

f(x) = 5 - 2x

g(x) = -4x + 2

We need to find g(f(x)) .

g(f(x)) = g(5-2x)

= -4(5-2x)+2

= (-4) (5) +(-4)(-2x) +2

= -20 +8x +2

= 8x-18

Hence, the value of g(f(x)) is 8x-18