化简并求值:(x+y)x+(x-y)x-(6x^2y-2xy^2)除以(2y),其中x=-2,y=1/3
问题描述:
化简并求值:(x+y)x+(x-y)x-(6x^2y-2xy^2)除以(2y),其中x=-2,y=1/3
答
(x+y)x+(x-y)x-(6x^2y-2xy^2)除以(2y)
=2x^2-(3x^2-xy)
=xy-x^2
=(-2)*1/3-(-2)^2
=-14/3