计算 (3/2xy+x的2次方-y的2次方)(-2xy)-(-xy)的2次方
(3/2xy+x²-y²)(-2xy)-(-xy)²求速度,求帮忙
人气:306 ℃ 时间:2019-10-11 06:15:57
解答
(3/2xy+x²-y²)(-2xy)-(-xy)²
(-3x²y² -2x³y+2xy³)-x²y²
=-4x²y²-2x³y+2xy³
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