求6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x
求6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x
6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²
3xy+xy+2x²y+yx²+3x²y等于多少
合并同类项:6x^2y+2xy-3x^2y^2-7x-5yx-4y^2x^2-6x^2y
.先化简,后计算.[2x(x²y-xy²)+xy(xy-x²)]/x²yx=20
x²-3xy-3x²y²+2yx²-y²x 合并同类项
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