[(x-3y)^2-(x-y)(x+2y)-11y^2除(-y)其中x=-1/6,y=-2013/2014
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
化简求值:【(x+Y)(X-Y)-(X-Y)的平方+2Y(2-Y)】除4Y,其中X=1 Y=2
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
先化简,再求值.其中x=-2,y=二分之一 {(x+y)2—(x+y)(x+3Y)—5Y平方}除2y
x+y)(x-y)+(x-y)^2-(6x^2y-2xy^2)/2y,其中x=-2,y=1/3
[(2x+y)^2+(y+2x)(y-2x)-2y(4x-y)]/4y,其中x=1/2,y=1/3
先化简,再求值:[(x+y)(x-y)-(x-y)^2+2y(x-3y)]/(-4y),其中x=1,y=-2
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
化简求值【(x+2y)的平方-(x+y)(x-y)-5y方】除2x ,其中x=-2,y=2分之1
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
(2x+y-1)(2x-y+1)-(3x+y)(3x-y),其中x=5分之1,