化简 (x+2)平方-(x-y)(y-x)
化简(x平方-y平方)/(x+y)+(x平方-2xy+y平方)/(x-y)
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
求(2x+y)(4x平方-2xy+y平方+y平方)化简
(x+y)(x-y)+(x-y)的平方-(6X的平方Y-2XY的平方)/2Y
(x平方+2xy+y的平方)/(x+y)
x(x-1)-(x平方-y)=-3,求x平方+y平方-2xy
.先化简再求值:(2x+y)(2x+y)-(2x-y)平方其中X,Y满足X平方+Y平方-2X+4Y+5=0
化简(x-2y)平方-(2x-y)(-2x-y)+(x-5y)(x+2y)
化简:[(2x-y)平方+(2x+y)(2x-y)-4x(x-y+1)]÷2x
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
(3x-y)的平方-(2x+y)的平方-5(x-y),化简
(2x-y)(4x的平方-y的平方)(2x+y)