x(x²-4)-(x+3)(x²-3x+2)-2x(x-2)化简完是什么

问题描述:

x(x²-4)-(x+3)(x²-3x+2)-2x(x-2)化简完是什么

x(x²-4)-(x+3)(x²-3x+2)-2x(x-2)
=x(x+2)(x-2)-(X+3)(X-1)(X-2)-2X(X-2)
=(X-2)(X^2+2X-X^2-2X+3-2X)
=(X-2)(3-2X)
=-2X^2+7X-6