Answers

2015-07-17T20:48:24+05:30
The sum of roots, here, alpha+beta= -b/a
product of roots, c/a.
use these equations to solve everything asked.
for the first, clue:
(a+b)^2=(a-b)^2 + 4ab
(a+b)^2= a^2+b^2 + 2ab
if you still have doubts, ask

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