[(5m+2n)(5m-2n)+(3m-2n)²]÷(-2m)

分类: 作业答案 • 2022-01-07 11:57:28

问题描述：

答

[(5m+2n)(5m-2n)+(3m-2n)²]÷(-2m)
=(25m²-4n²+9m²-12mn+4n²)÷(-2m)
=(34m²-12mn)﹜(-2m)
=-17m+6mn