3(xy^2-x^2y)-2(xy+xy^2)+3x^2yvxcv

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3(xy^2-x^2y)-2(xy+xy^2)+3x^2yvxcv
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3(xy^2-x^2y)-2(xy+xy^2)+3x^2yvxcv
3(xy^2-x^2y)-2(xy+xy^2)+3x^2y
vxcv

3(xy^2-x^2y)-2(xy+xy^2)+3x^2yvxcv
3(xy^2-x^2y)-2(xy+xy^2)+3x^2y
=3xy(y-x)-2xy(1+y)+3x^2y
=xy(3y-3x-2-2y+3x)
=xy(y-2)

2x²y-3(2xy-xy)-xy (-3xy+2xy)-(4xy+xy) xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2 （X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程 3xy(x^2y-xy^2+xy)-xy^2(2x^2-6xy+2x)过程 计算：3xy(x²y-xy²+xy)-xy²(2x-xy+2x） x^2-xy/xy-y^2约分 x^2-xy-6y^2+3xy+y+2 3xy(x^2-xy^2+xy)-xy^2(2x^2-xy+2x) 计算：3xy[2xy-x（y-2）+x] 计算3xy[2xy-x(y-2)+x-1] （-3x^y+2xy)-( )=4x^+xy 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] (x^2+2xy+y^2-4xy)*(x^2-2xy+y^2+4xy) 因式分解：(2x-y)(x^2+xy-2y^2) xy(x^2-xy)(-3xy^2) x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) (-1/3xy)^2•[xy(2x-y)-2x(xy-y^2)]