若将x-y看成一个整体,则化简(x-y)^2—3(x-y)-4(x-y)^2+5(x-y)

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? 数学(x-y)^5*(y-x)^3*(x-y)^2 （x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3) 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2) x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8 (2X-3y)-(5x-y) (x+3y-4)(2x-y)