(x+y)²*(x²-2xy+y²)=( )²
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/26 03:02:00
![(x+y)²*(x²-2xy+y²)=( )²](/uploads/image/z/8870999-23-9.jpg?t=%EF%BC%88x%2By%29%26%23178%3B%2A%EF%BC%88x%26%23178%3B-2xy%2By%26%23178%3B%EF%BC%89%3D%EF%BC%88+%EF%BC%89%26%23178%3B)
(x+y)²*(x²-2xy+y²)=( )²
(x+y)²*(x²-2xy+y²)=( )²
(x+y)²*(x²-2xy+y²)=( )²
填:x³+y³
利用立方和公式得
(x+y)²*(x²-2xy+y²)²
=[(x+y)(x²-2xy+y²)]²
=(x³+y³)²
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来源:学生作业帮助网 编辑:作业帮 时间:2024/06/26 03:02:00
(x+y)²*(x²-2xy+y²)=( )²
(x+y)²*(x²-2xy+y²)=( )²
(x+y)²*(x²-2xy+y²)=( )²
填:x³+y³
利用立方和公式得
(x+y)²*(x²-2xy+y²)²
=[(x+y)(x²-2xy+y²)]²
=(x³+y³)²