数学多项式题急求[x-3y}×{x-5y} 和{2x-3y}×{3x-5y}仔细点急啊!
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)
(2X-3y)-(5x-y)
求多项式2x-3y与5x+4y的和
合并多项式:5(x-y)²-(x-y)-8(x-y)²-3(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)
【多项式相乘】:(3x-y)(y+3x)-(4x-3y)(4x+3y)
将多项式3x^2y^2-xy^3+5x^4y-7y^5+x^6y^4分别按x,y降幕排列
|x|=3 |y|=5 |x-y|=|x|+|y| 求 X+Y和 X-Y 等于多少
(y-x)(x-y)^3(y-x)^5怎么算
2(2x+3y)(3x+2y)-(6x-y)(2x-5y)