f.3 math
2009-04-11 3:03 am
The distance between two points H(4,5) and K(6,x) is 8.find the possible values of x
回答 (2)
2009-04-12 11:07 pm
✔ 最佳答案
The distance between two points H(4,5) and K(6,x) is 8.find the possible values of x Solution:
HK=8
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2009-04-11 3:22 am
(6 - 4)^2 + (x - 5)^2 = 8^2
4 + x^2 - 10x + 25 = 64
x^2 - 10x - 35 = 0
x = (10 ± 4 sqrt(15))/2
x = 2 ± 2 sqrt(15)
X = 9.746 OR X = -5.746
4 + x^2 - 10x + 25 = 64
x^2 - 10x - 35 = 0
x = (10 ± 4 sqrt(15))/2
x = 2 ± 2 sqrt(15)
X = 9.746 OR X = -5.746
收錄日期: 2021-04-23 20:36:20
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090410000051KK01516