(x+y)(x-y)+(x-y)^2-(6x^2-2xy^2)÷(2y)

问题描述:

(x+y)(x-y)+(x-y)^2-(6x^2-2xy^2)÷(2y)

x^2-y^2+x^2-2xy+y^2-3x^2/y+xy=2x^2-xy-3x^2/y=(2x^2y-xy^2-3x^2)/y