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maths題1題
2008-08-09 9:51 pm
回答 (1)
2008-08-09 10:14 pm
✔ 最佳答案
3a^2+4a+2=73a^2+4a=7-2
3a^2+4a=5 ... (1)
12a^2 + 16a + 1 = 4(3a^2 + 4a) + 1
from (1)
12a^2 + 16a + 1 = 4(5) + 1 = 21
收錄日期: 2021-04-13 15:55:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080809000051KK01210