a:b:c=2:3:4
a(2次方)-b(2次方)+c(2次方)=44
急需解决~THX~
關於中五數學題目
2007-09-14 5:38 am
回答 (1)
2007-09-14 5:47 am
✔ 最佳答案
let a = 2k, then b = 3k, c = 4k
a^2 - b^2 + c^2 = 44
(2k)^2 - (3k)^2 + (4k)^2 = 44
11k^2 = 44
k^2 = 4
k = 2 or -2
so,
when k = 2,
a = 4, b = 6, c = 8
when k = -2,
a = -4, b = -6, c = -8
收錄日期: 2021-04-13 13:28:04
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070913000051KK04003