f(X)=-2(X+3)^2+2怎样转换成-2X^2-12x-6?

问题描述:

f(X)=-2(X+3)^2+2怎样转换成-2X^2-12x-6?

f(X)=-2(X+3)^2+2
=-2(x²+9+6x)+2
=-2x²-12x-18+2
=-2x²-12x-16;