f(x) = X-5 g(x) = 3X²+2X maka A. g(F(2)) B. f(g(X) tolonggg yaa makasih....

A). g(f(x))= 3(x-5)²+2(x-5)
= 3(x²-10x+25)+2x-10
= 3x²-30x+75+2x-10
=3x²-28x+65
g(f(2))= 3(2)²-28(2)+65
= 12-56+65
=21
B). f(g(x) = (3x²+2x) -5
= 3x²+2x-5

a.)

g(f(2))

f(2) = 2 - 5 = -3

g(-3) = 3 × (-3)^2 + 2 × -3
= 3 x 9 - 6
= 27 - 6
= 21

g( f(2) ) = 21

b)

f(g(x)) = f(3x^2 + 2x)
f(x) = x - 5

f(3x^2 + 2x ) = 3x^2 + 2x - 5
atau.
f(3x^2 + 2x) = (3x + 5)(x - 1)