合并同类项:7xy-8wx+5xy-12xy 2a+3b+6a+9b-8a+12b 30a²b+2b²
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/08/19 17:52:15
合并同类项:7xy-8wx+5xy-12xy 2a+3b+6a+9b-8a+12b 30a²b+2b²c-15a²b-4b²c
合并同类项:7xy-8wx+5xy-12xy 2a+3b+6a+9b-8a+12b
30a²b+2b²c-15a²b-4b²c
合并同类项:7xy-8wx+5xy-12xy 2a+3b+6a+9b-8a+12b
30a²b+2b²c-15a²b-4b²c
![合并同类项:7xy-8wx+5xy-12xy 2a+3b+6a+9b-8a+12b 30a²b+2b²](/uploads/image/z/5747919-15-9.jpg?t=%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9%EF%BC%9A7xy-8wx%2B5xy-12xy+2a%2B3b%2B6a%2B9b-8a%2B12b+30a%26%23178%3Bb%2B2b%26%23178)
7xy-8wx+5xy-12xy
=(7xy+5xy-12xy)-8wxx
=0-8wx
=-8wx
2a+3b+6a+9b-8a+12b
=(2a+6a-8a)+(3b+9b+12b)
=0+24b
=24b
30a²b+2b²c-15a²b-4b²c
=(30a²b-15a²b)+(2b²c-4b²c)
=15a²b-2b²c
=(7xy+5xy-12xy)-8wxx
=0-8wx
=-8wx
2a+3b+6a+9b-8a+12b
=(2a+6a-8a)+(3b+9b+12b)
=0+24b
=24b
30a²b+2b²c-15a²b-4b²c
=(30a²b-15a²b)+(2b²c-4b²c)
=15a²b-2b²c
合并同类项:7xy-8wx+5xy-12xy 2a+3b+6a+9b-8a+12b 30a²b+2b²
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