解不等式 (2x+3y)(2x-3y)-6>(2x+3y)(2x+3y)
设不等式组x+y-2>=0,x-3y+6>=0,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)+【-
因式分解3x^2(x-y)+6x(y-x)
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(
不等式3x+2y-6
计算(x+y)(x+y)^2(-x-y)^3
数学(x-y)^5*(y-x)^3*(x-y)^2
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y