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Hilda
Joined: 15 Apr 2004Posts: 12
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Posted: Fri Apr 16, 2004 11:57 pm Post subject: 求三個內角度數和三條邊的長
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已知△ABC的三邊是a、b、c，其中a、b是方程x2-4(√3 +1)x+16√3=0的兩個根，且a>b，方程a(1-x2)+2bx+c(1+x2)=0有兩個相等的實數根，求三個內角度數和三條邊的長。
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me
Frequent VisitorJoined: 12 Feb 2004Posts: 194
Location: Hong Kong
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Posted: Sat Apr 17, 2004 2:11 am Post subject: Re: 求三個內角度數和三條邊的長
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Hilda wrote:
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| 已知△ABC的三邊是a、b、c，其中a、b是方程x2-4(√3 +1)x+16√3=0的兩個根，且a>b，方程a(1-x2)+2bx+c(1+x2)=0有兩個相等的實數根，求三個內角度數和三條邊的長。 |
Just use sum of roots and product of roots and △, which have been mentioned in the previous post.
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