化简x^2y-3xy^2+2yx^2-y^2x 3(4a^2b-5ab^2)-(3a^2b-4ab^2) x-[3x-2(1+2x)]2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]

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化简x^2y-3xy^2+2yx^2-y^2x3(4a^2b-5ab^2)-(3a^2b-4ab^2)x-[3x-2(1+2x)]2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-x

化简x^2y-3xy^2+2yx^2-y^2x 3(4a^2b-5ab^2)-(3a^2b-4ab^2) x-[3x-2(1+2x)]2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]
化简x^2y-3xy^2+2yx^2-y^2x 3(4a^2b-5ab^2)-(3a^2b-4ab^2) x-[3x-2(1+2x)]
2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]

化简x^2y-3xy^2+2yx^2-y^2x 3(4a^2b-5ab^2)-(3a^2b-4ab^2) x-[3x-2(1+2x)]2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]
x^2y-3xy^2+2yx^2-y^2x
=3x²y-4xy²
3(4a^2b-5ab^2)-(3a^2b-4ab^2)
=12a²b-15ab²-3a²b+4ab²
=9a²b-11ab²
x-[3x-2(1+2x)]
=x-3x+2(1+2x)
=-2x+2+4x
=2x+2
2(x^2-xy)-3(2x^2-3xy)-2[x^2-(2x^2-xy+y^2)]
=2x²-2xy-6x²+9xy-2x²+4x²-2xy+2y²
=-2x²+5xy+2y²

x^2y-3xy^2+2yx^2-y^2x化简化简 x²y-3xy²+2yx²-y²x 3xy+xy+2x²y+yx²+3x²y等于多少化简（2xy-y）-（-y+yx）得多少? xy^2-x-yx^2+y变为(y-x)(xy+1)xy^2-x-yx^2+y化为(y-x)(xy+1)感觉不像十字相乘法. 因式分解x^2+xy+3x+3yx^2+xy+3x+3y 因式分解 -x^2y+5xy^2-yx^2合并同类项 X^2Y-3XY^2+2YX^2-Y^2X=? 化简：3x^2-(7x-(4x-3)-2x^2) (2xy-y)-(-y+yx) x²y-3xy²+2yx²-y²x x²y－3xy²+2yx²－y²x,急用! x²y-3xy²+2yx²-y²x（列算式） xy-3xy+2yx-yx 已知X-Y=4XY,求(2X+3Y-2Y)/(X-2YX-Y)的值 2x²y+3xy²+5xy-6yx+2 合并同类项合并同类项 2x的平方y+3xy的平方+5xy-6yx+2 化简：x的平方y-3xy的平方+2yx的平方-y的平方x (xy-x^2)÷x^2-2xy+y^2/xy*x-y/y^2*yx^-2(xy-x^2)÷{x^2-2xy+y^2/xy}*{x-y/y^2}*{yx^-2}