21x⁴y³-( )+7x²y²÷﹙-7x²y)= ( )+5xy-y
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/13 14:26:47
![21x⁴y³-( )+7x²y²÷﹙-7x²y)= ( )+5xy-y](/uploads/image/z/3816099-27-9.jpg?t=21x%26%238308%3By%26%23179%3B%EF%BC%8D%EF%BC%88+%EF%BC%89%EF%BC%8B7x%26%23178%3By%26%23178%3B%C3%B7%EF%B9%99%EF%BC%8D7x%26%23178%3By%29%3D+%EF%BC%88+%EF%BC%89%2B5xy-y)
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21x⁴y³-( )+7x²y²÷﹙-7x²y)= ( )+5xy-y
21x⁴y³-( )+7x²y²÷﹙-7x²y)= ( )+5xy-y
21x⁴y³-( )+7x²y²÷﹙-7x²y)= ( )+5xy-y
21x⁴y³-( )+7x²y²÷﹙-7x²y)= 21x⁴y³-( )-y
所以括号里的是21x⁴y³-5xy