(2xy+1/5x)^2
(1)X²+5X+6 (2)Xy²+2Xy+X
(1) -3X^-2XY-8XY-(-5Y^2)-2X^2-Y^2
分解因式:(X+Y)*(X+Y+2XY)+(XY+1)*(XY-1)
xy(xy+1)+(xy+3)-2(x+y+2分之一)-(x+y-1)的平方
5x^2y/-1/2xy*3xy^2
计算:(1)(7-3x)+(5x-6) (2)-(x^2-3)-(7-5x^2) (3)xy-(3x-2xy)+(3xy
1、xy²+2xy-x(因式分解)
化简!1、(x^2-xy)+xy+y^2 2、3(x^2-xy)-xy+y^2
(-1/2xy)(2/3x^2y-3/2xy^2+6/5y)
1/x-1/y=5求(-x+xy+y)/(2x+7xy-2y)
已知(x+1)^2+|y-1|=0,求2(xy-5xy^2)-(3xy^2-xy)的值.
化简求值 已知:(x+2)2;+|y+1|=0求5xy²-{2xy²-[3xy²(4xy&