(7x²-4xy+2y²)-2(x²-二分之三y²)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 19:53:34
![(7x²-4xy+2y²)-2(x²-二分之三y²)](/uploads/image/z/4028988-12-8.jpg?t=%287x%26%23178%3B-4xy%2B2y%26%23178%3B%EF%BC%89-2%EF%BC%88x%26%23178%3B-%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%89y%26%23178%3B%EF%BC%89)
(7x²-4xy+2y²)-2(x²-二分之三y²)
(7x²-4xy+2y²)-2(x²-二分之三y²)
(7x²-4xy+2y²)-2(x²-二分之三y²)
(7x²-4xy+2y²)-2(x²-二分之三y²)
=7x²-4xy+2y²-2x²+3y²
=5x²-4xy+5y²
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 19:53:34
(7x²-4xy+2y²)-2(x²-二分之三y²)
(7x²-4xy+2y²)-2(x²-二分之三y²)
(7x²-4xy+2y²)-2(x²-二分之三y²)
(7x²-4xy+2y²)-2(x²-二分之三y²)
=7x²-4xy+2y²-2x²+3y²
=5x²-4xy+5y²