1. (3x+4b)^2
2. (5p+3q)^2
3. (3x-y)^2
4. (5x-4y)^2
5. (7x-3y)^2
6. (1-m)(1+m)
7. (m-3n)(m+3n)
Expand...thx
2007-05-12 2:18 am
回答 (1)
2007-05-12 2:30 am
✔ 最佳答案
1. (3x+4b)^2 = 9x^2 + 24xb + 16b^22. (5p+3q)^2 = (25p^2 + 30pq + 9q^2
3. (3x-y)^2 = (9x^2 - 6xy + y^2
4. (5x-4y)^2 = (25x^2 - 40xy + 16y^2
5. (7x-3y)^2 = (49x^2 - 42xy + 9y^2
6. (1-m)(1+m) = 1 - m^2
7. (m-3n)(m+3n) = m^2 - 9n^2
收錄日期: 2021-04-25 19:52:31
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070511000051KK02820