已知x+y=6,x-y=4,则(x-y)2y-2x(y-x)的值是多少

问题描述:

已知x+y=6,x-y=4,则(x-y)2y-2x(y-x)的值是多少

我来吧,希望得到满意
(x-y)2y-2x(y-x)
原式=(x-y)2y+2x(x-y)
=(x-y)(2y+2x)
=2(x-y)(x+y)
=2X6X4
48

(x-y)2y-2x(y-x)=(x-y)2y+2x(x-y)=2(x+y)(x-y)=2*6*4=48