[(x+y)3-2(x+y)2-4(x+y)] ÷(x+y)等于多少急!!! 帮帮忙

来源：百度知道编辑：UC知道时间：2024/06/18 23:50:36

(x+y)^3这一项应该怎样算?

[(x+y)^3-2(x+y)^2-4(x+y)] ÷(x+y)

[(x+y)3-2(x+y)2+4(x+y)] ÷(x+y)
=(x+y)^2-2(x+y)+4
=(X+Y-2)^2

(把(X+Y)看成整体把分子中的每一项分别与分母相除)
我觉得应该最后一项是+4(X+Y)
(x+y)^3÷(x+y)=(X+Y)^(3-1)
根据公式：a^m÷a^n=a^(m-n)

2(x+y)2什么意思啊

(2x+y)(2x-y)-(3x-2y)(x+y)-y(2x-y) (x-2y)^2+(x-y)(x-2y)-2(x-3y)(x-y) x^2+3(x+y)+3-y^2+(x-y) (X-3y)(x+3y)-(x-3y)^2 3X(X-Y)+2Y(X-Y) 3(x+y)(x-y)+4(x-y)^2=? 3(X+Y)-2(X-Y)+2 3(x+y)-2(x-y)=9 5(x+y)+2(x-y)=-1 (x-y)的平方-2(x+y) ( y-x)+3(x-y) 若3x-2y=0,求(x+y)/(x-y)+(x-y)/(x+y)的值

[(x+y)3-2(x+y)2-4(x+y)] ÷(x+y)等于多少 急!!! 帮帮忙

[(x+y)3-2(x+y)2-4(x+y)] ÷(x+y)等于多少急!!! 帮帮忙