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这是一个关于年龄的问题。我不知道如何解决这个问题。请帮我。问题是

> A man is 5 times as old as his son. 2 years ago the sum of squares of
> their ages was 11, 14. find the present age of son?
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不是真正的编程问题..但是，嘿，我认为每个程序员都需要一些数学技能。

因为这看起来像一个家庭作业问题..让我给你一些指示。

A man is 5 times as old as his son

儿子的年龄 = x，男人的年龄 = 5x

2 years ago the sum of squares of their ages was 1114 (I think)

(x-2) 2 + (5x-2) 2 = 1114

求解x！！

于 2013-08-15T15:49:41.233 回答