Diketahui f(×)=2×-3 dan g (×)=×2+3,jika (f o g)(a)adalah 33.tentukanlah nilai dari a

Fog(a) = 2(a²+3) – 3 = 33
fog(a) = 2a² – 3 = 33
fog(a) = 2a² = 36
fog(a) = a² = 18
a = √18
a = 3√2