63a 2次+7(b-5) 2次
(5a-3)(a-b)+3b(a-b)
數學題 化簡 有步驟唔該
2008-01-02 1:36 am
回答 (1)
2008-01-03 7:06 pm
✔ 最佳答案
1. 63a^2 + 7(b - 5)^2= 7[9a^2 + (b - 5)^2]
2. (5a - 3)(a - b) + 3b(a - b)
= (a - b)[(5a - 3) + 3b]
= (a - b)(5a + 3b - 3)
收錄日期: 2021-04-13 19:43:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080101000051KK02849