jika f(x)=2x²-3x+2 dan g(x)=x+2 tent a) fof (x) b) gog (x)

fof(x)= f(f(x))
=f(2x²-3x+2)
=2(2x²-3x+2)² - 3(2x²-3x+2) + 2
=2(4x⁴-12x³+17x²-12x+4) - 6x²+9x-6+2
=8x⁴-24x³+34x²-25x+8-6x²+9x-8
=8x⁴-24x³+28x²+9x
gog(x)=g(g(x))
=g(x+2)
=x+2+2
=x+4