f(x) = x^2 +x g(x) = x^2 tentukan (fog) (x) dan (gof) (x)

(fog)(x)
= f(g(x))
= (x²)² + x²
= [tex] x^{4} [/tex] + x²

(gof)(x)
= g(f(x))
= (x²+x)²
= [tex] x^{4} [/tex]+2x³+x²