Jika f(x)=2x+3dan g(x)=xpangkat2 +2 maka nilai dari gof(-2)

jawab

gof(-2)= g { f (-2)}
= g {2(-2)+3)
= g(-4+3)
= g(-1)
= (-1)^2 + 2
= 1 + 2
= 3