化简!1、(x^2-xy)+xy+y^2 2、3(x^2-xy)-xy+y^2
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化简!1、(x^2-xy)+xy+y^2 2、3(x^2-xy)-xy+y^2
化简!1、(x^2-xy)+xy+y^2 2、3(x^2-xy)-xy+y^2
化简!1、(x^2-xy)+xy+y^2 2、3(x^2-xy)-xy+y^2
1.x^2+y^2。2.(3x-y)(x-y)
化简!1、(x^2-xy)+xy+y^2 2、3(x^2-xy)-xy+y^2
化简 2(xy-xy²+3)-(-4xy²+xy-1) 其中,x等于--4,y等于-3
分解因式:(X+Y)*(X+Y+2XY)+(XY+1)*(XY-1)
1.(xy-1)^2-(x+y-2xy)(2-x-y)2.(x+y)(x+y+2xy)+(xy-1)(xy+1)
化简3x^2y-[2xy^2-2(xy-3/2x^2y)+xy]+3xy^2
5x^2y-3xy^2+4xy-14xy^2+4xy-2x^2y(化简)
5xy^2-{2x^y-[3xy^2-(xy^2-2x^2y)]/(-1/2xy)}
.(x+y-2)(x+y-2xy)+(xy-1)^2
(X-3xy+4xy-y)-[-2x-2(xy-3/2xy)-y]+6xy的过程
计算(3x^2y-xy^2+1/2xy)/(-1/2xy)
计算(-3分之1xy²)²×[xy(2x-y)+xy²]=
计算:3xy(x²y-xy²+xy)-xy²(2x-xy+2x)
(xy-x²)÷(x²-2xy+y²/xy)×(x-y/x²)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
化简x^-y^/x^-2xy+y^
化简:3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
计算:3xy[2xy-x(y-2)+x]
计算3xy[2xy-x(y-2)+x-1]