I need help with this question.

a) 4x

b)

and

8(9y-2)

Step-by-step explanation:

For part a) We want to simplify:

This gives us

For part b), we factorize

There is a common factor of 8

This also equals:

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2