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Old 2003-08-27, 07:59   #2
andi314
 
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Nov 2002

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==>
(4)(a^2)(c^2) - (a^2 - b^2 + c^2)^2 =

- (a + b + c)·(a + b - c)·(a - b - c)·(a - b + c)


hope i could help you
andi314
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