di ketahui f(x)=2x+1 dan g(x)=x² tentukan a.(fog)(x) b(gof)(x)

a. (f о g)(x) = 2(x²)+1 = 2x²+1
b. (g о f)(x) = (2x+1)² = 4x² + 4x + 1

A. (fog)(x)
=2(x^2)+1
=2x^2+1

B.(gof)(x)
=(2x+1)^2
=(2x+1)(2x+1)
=4x^2+2x+2x+1
=4x^2+4x+1

"moga bener lah ya, sorry kalo salah"