求(2x-3y)(2x+3y)-(3x+2y)(2x-3y)
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
【x-3y][x+y]-[x-2y][x +2y]-[x-y
有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【-
已知 2x-3y/y等于2 求x-y/2x 求x-3y/2x+y
计算(x+y)(x+y)^2(-x-y)^3
数学(x-y)^5*(y-x)^3*(x-y)^2
(x-y)^2-(x-y)^3因式分解
计算:(-x-2y) * (3x-y)
(x+y)^2-3(x-y)因式分解