Hi I really need help. Plz do all the problem

Question

1. g(a)=a²-3a

h(a)=3a-1

Find g(h(a))

2.g(t)=-t

Find g(g(t))

3.g(x)=3x+3

f(x)=x³-3x²

Find g(f(x))

Answer 1

Problem 1 Find g(h(a))

g(a) = a²-3a

h(a) = 3a-1

g(h(a)) = (3a - 1)² - 3(3a - 1) Substitute h(a) into g(a)

= 9a² - 6a + 1 - 9a + 3

= 9a² - 15a + 4

Problem 2

g(t) = -t

Find g(g(t)) = g(-t)

Problem 3 Find g(f(x))

g(x) = 3x + 3

f(x) = x³ - 3x²

g(f(x)) = 3(x³ - 3x²) + 3

= 3x³ - 9x² + 3