5x(x-y)+2y(x-y)
数学(x-y)^5*(y-x)^3*(x-y)^2
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
1、x(x-y)(x+y)-x(x+y)^2
(X+2Y)(5X-2Y)
(2X-3y)-(5x-y)
{(x,y) |x|+|y|
x>y?x:y
1) (2x+5y)(2x-5y)(-4x^2-25y^2) 2) [(x+y)(x-y)-(x-y)^2+2y(x-y
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
[(x+2y)(x-2y)-(2x-y)^2+(3x-y))2x-5y)]/(-x)
(1)(x^2/x)-y-x-y
【(x-y)^2+(x+y)(x-y)】除以 2x