Given that a , b and c are the lengths of the sides of ABC.
Prove that if (c + a)x^2 + 2bx + (c - a) = 0 has two equal roots, then ABC is
a right-angled triangle.
Not Homework!!!!!!!
我特意不給圖的，懂不懂????
AMaths(1) - Quadratic Equation
2010-09-04 4:20 am
回答 (1)
2010-09-04 4:39 am
收錄日期: 2021-04-22 00:51:09
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https://hk.answers.yahoo.com/question/index?qid=20100903000051KK01231