计算:6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y
3个回答
6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y
=6x²y-6x²y+2xy-5yx-3x²y²-4y²x²-7x
=0-3xy-7x²y²-7x
=-x(3y+7xy²+7)
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