将(x-y)看成一个整体,将3(x-y)²-4(x-y)+7(x-y)-6(y-x)²-2(y-x)
若将x-y看成一个整体,合并多项式(x-y)2+3(x-y)-2(y-x),可得多少
若将x-y看成一个整体,合并多项式(x-y)+3(x-y)-2(y-x),可得-------
(x+y)和(x-y)各看成一个整体,合并同类项2(x+y)-3(x-y)²+3(x+y)+4(x-y)
若将X-Y看成一个整数,合并多项式(X-Y)²+3(X-Y)-2(Y-X),可得?
化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)
因式分解:(x-y)(3x-7y)²-4(x-y)(x+y)²
{(x,y) |x|+|y|
x>y?x:y
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^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8