diketahui f(x)=3x+7 dan g(x)=2x+5 jika (f °g)(p)=-2 nilai dari p=

f(x) = 3x +7, dan g(x) = 2x +5.
(f o g) (p) = -2
f { g(p) } = f (2p +5)
3 (2p +5) +7) = -2
6p +15 +7 = -2
6p +22 = -2
6p = -2 -22
6p = -24
p = -24/6
p = -4