pleas solve this poblem

Asked by  | 5th Aug, 2008, 12:44: PM

Expert Answer:

  the condition  for the 2 roots to be equal is  b2  - 4ac = 0

  ( 2mc )2  == 4 ( 1 +m 2)  (c- a2

    4 m2 c2  == 4  [ c2+m2c2- a2+ m2a2 ]

  m2c= c2 +m2 c2- a2 + m2a2   ===>.c2  == a2(  1 + m2)

   therefore   c2 =a2 ( 1 + m2)

 

Answered by  | 5th Aug, 2008, 05:41: PM

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