(x+y)(x-y)+(x-y)2-(6x2y-2xy2)÷2y.
题型:解答题难度:一般来源:不详
(x+y)(x-y)+(x-y)2-(6x2y-2xy2)÷2y. |
答案
原式=x2-y2+(x2-2xy+y2)-(3x2-xy) =x2-y2+x2-2xy+y2-3x2+xy =-x2-xy. |
举一反三
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