因式分解:(x的平方-y的平方)(x+y)-(x-y)的三次方

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/15 02:53:25
因式分解:(x的平方-y的平方)(x+y)-(x-y)的三次方

因式分解:(x的平方-y的平方)(x+y)-(x-y)的三次方
因式分解:(x的平方-y的平方)(x+y)-(x-y)的三次方

因式分解:(x的平方-y的平方)(x+y)-(x-y)的三次方
(x^2-y^2)(x+y)-(x-y)^3
=(x+y)(x-y)(x+y)-(x-y)^3
=(x-y)[(x+y)^2-(x-y)^2]
=(x-y)[(x+y)+(x-y)][(x+y)-(x-y)]
=(x-y)*2x*2y
=4xy(x-y)

(x的平方-y的平方)(x+y)-(x-y)的三次方
=(x+y)(x-y)(x+y)-(x-y)*(x-y)^2
=(x^2+2xy+y^2)(x-y)-(x^2-2xy+y^2)(x-y)
=(x^2+2xy+y^2-x^2+2xy-y^2)(x-y)
=4xy(x-y)