Question

dada as funções f(x) = x-3 e g(x) = x², calcule: 
a) fog(x)
b) gof(x)

Answer 1

f(x)=x-3
g(x)=x²

a)f(g(x))=?
f(g(x))=x²
f(g(x))=(x-3)²
f(g(x))=x²-2.3x+3²
f(g(x))=x²-6x+8

b)g(f(x))=?
g(f(x))=x-3
g(f(x))=x²-3