求过程(2x-y)(2x+y)+2x(x-2y) (x/2+3)²-(x/2-3)² (2a-b)&
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(
4a[x-y]的平方-2b【Y--X】的平方+[y-X]求过程
x²(x+y)(y-x)-xy(x+y)(x-y) 已知a+b=4,ab=-2,求多项式3a²b+3
因式分解:(2x-3y)(a+b)+(3x-2y)(a+b)求过程急
若集合A={(x,y)|y=x²,x∊R},B={(x,y)|y=2x²+2x-3,x&
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)
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)+【-
(x-y)X(2x-2y)²X(3x-3y)²
1、x(x-y)(x+y)-x(x+y)^2
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)