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=?](/uploads/image/z/5485679-71-9.jpg?t=3f%2B2f-7f%3D%3Fx-f%2B5x-4f%3D%3F2a%2B3b%2B2b%E5%B9%B3%E6%96%B9c-15a%E5%B9%B3%E6%96%B9b-4b%E5%B9%B3%E6%96%B9c%2B%3F%E8%B0%A2%E8%B0%A2%E4%BA%863pq%2B7pq%2B4pq%2Bpq%3D%3F7xy-8wx%2B5xy-12xy%3D%3F)
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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
?