(x+y)立方-(x+y)(x-y)平方 怎么算

如题所述

(x+y)立方-(x+y)(x-y)^2
=(x+y)[(x+y)^2-(x-y)^2]
=4xy(x+y)
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第1个回答  2012-08-16
(x+y)³-(x-y)²(x+y)
=(x+y)(x+y)²-(x+y)(x-y)²
=(x+y)[(x+y)²-(x-y)²]
=(x+y)2x2y
=4xy(x+y)

(x+y)立方-(x-y)平方(x+y)的答案是
(x+y)[(x+y)平方-(x-y)平方]=(x+y)(2x)(2y)=4xy(x+y)

(x+y)^3-(x-y)^2(x+y)因式分解
原式为:(x+y)³-(x-y)²(x+y)=(x+y)(x+y)²-(x+y)(x-y)²=(x+y)【(x+y)²-(x-y)²】=(x+y)2x2y =4xy(x+y)

x(x+y)的立方-(x-y)的平方(x+y)因式分解
x(x+y)的立方-(x-y)的平方(x+y)=(x+y)[x(x+y)-(x-y)²]=(x+y)(x²+xy-x²+2xy-y²)=(x+y)(3xy-y²)=y(x+y)(3x-y)

把下列多项式因式分解(x+y)的立方-(x-y)的平方(x+y)
=(x+y)[(x+y)^2-(x-y)^2]=4xy(x+y)

(x+y)²(x-y)+(x+y)(x-y)²=?
解:原式=(x-y)(x+y)(x+y+x-y)=2x(x-y)(x+y)

(x+y)的平方(x-y)-(x+y)(x-y)的平方
先提公因式 =(x-y)(x十y)(x十y-x十y)=2y(x方-y方)满意请采纳

(x+y)的平方-(x-y)(x+y)
(x+y)的平方-(x-y)(x+y)=(x+y)(x+y-x+y)=2y(x+y)朋友,请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!!!朋友,请【采纳答案】,您的采纳是我答题的动力,如果没有明白,请追问。谢谢。

(x+y)(x-y)-(x+y)的平方
方法如下,请作参考:若有帮助,请采纳。

(x+y)的平方(x-y)+(x+y)(x-y)的平方 ,分解因式
(x+y)的平方(x-y)+(x+y)(x-y)的平方 =(x-y)(x+y)(x+y+x-y)=2x(x-y)(x+y)=2x(x²-y²)=2x³-2xy²如有不明白,可以追问 如有帮助,记得采纳,谢谢

因式分解:(x+y)的立方乘以(x+y)的平方减(-x-y)
原式=(x+y)3(x+y)2+(x+y) =(x+y)(x+y)4

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