tolondk dijawab ya....

fog(x)= 3(2x^2+1) = 6x^2+3
fog(3)= 6(3.3)+3 = 54+7 = 61

gof(x)= (x+1)^2-2(x+1)+2 = x^2+2x+1-2x-2+2 = x^2+1
gof(-1)= (-1)^2+1 = 2