1.m×4×n-4×n×m
2.y×x×7-2×x×x+4×y×y-10×x×y
2
3.m×2m-4m+m×m ←←← ←← (m二次)
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I WANT TO HAVE ANSWER
2012-10-09 2:11 am
回答 (2)
2012-10-11 3:19 am
✔ 最佳答案
(All answers are in decending order) ．=乘號
^2 =二次
1)
m．4．n - 4．n．m
= 4mn - 4mn
= 0
2)
y．x．7 - 2．x．x + 4．y．y - 10．x．y
=7xy - 2x^2 + 4x + 4y^2 - 10xy
= -2x^2 + 4x - 3xy + 4y^2
3)
m．2m - 4m + m．m
= 2m^2- 4m + m^2
= 3m^2 - 4m
參考: myself
2012-10-09 2:19 am
(m二次) = m^2
1. 4mn -4mn
= 0
2. 7yx-2x^2+4y^2-10xy
= -3xy+4y^2-2x^2
3. 2m^2-4m+m^2
=3m^2-4m
1. 4mn -4mn
= 0
2. 7yx-2x^2+4y^2-10xy
= -3xy+4y^2-2x^2
3. 2m^2-4m+m^2
=3m^2-4m
參考: me
收錄日期: 2021-04-13 19:02:48
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20121008000051KK00316