Question

dadas as funçoes f (x) = 5x-8 e g(x)=x ao quadrado + 4x determine g(f(x))​

Answer 1

f(x) =5x-8

g(x) =x²+4x

g(f(x))=f(x)²+4f(x)

g(f(x))=(5x-8)²+4(5x-8)

g(f(x))=25x²-80x+64+20x-32

g(f(x)) =25x²-60x+32