3f+2f-7f=?x-f+5x-4f=?2a+3b+2b平方c-15a平方b-4b平方c+?谢谢了3pq+7pq+4pq+pq=?7xy-8wx+5xy-12xy=?

来源:学生作业帮助网 编辑:作业帮 时间:2024/07/19 13:56:07
3f+2f-7f=?x-f+5x-4f=?2a+3b+2b平方c-15a平方b-4b平方c+?谢谢了3pq+7pq+4pq+pq=?7xy-8wx+5xy-12xy=?
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3f+2f-7f=?x-f+5x-4f=?2a+3b+2b平方c-15a平方b-4b平方c+?谢谢了3pq+7pq+4pq+pq=?7xy-8wx+5xy-12xy=?
3f+2f-7f=?x-f+5x-4f=?2a+3b+2b平方c-15a平方b-4b平方c+?
谢谢了3pq+7pq+4pq+pq=?7xy-8wx+5xy-12xy=?

3f+2f-7f=?x-f+5x-4f=?2a+3b+2b平方c-15a平方b-4b平方c+?谢谢了3pq+7pq+4pq+pq=?7xy-8wx+5xy-12xy=?
3f+2f-7f=-2f
x-f+5x-4f=6x-5f
2a+3b+2b平方c-15a平方b-4b平方c
=2a+3b+2b^2c-15a^2b-4b^2c
3pq+7pq+4pq+pq
=(3+7+4+1)pq
=15pq
7xy-8wx+5xy-12xy
=(7+5-12)xy-8wx
=-8wx