Question

identity of alpha^2+beta^2+gamma^2
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Answer 1

Answer:

${ \alpha }^{2} + { \beta}^{2} + { \gamma }^{2} = {( \alpha + \beta + \gamma )}^{2} - 2( \alpha \beta + \beta \gamma + \gamma \alpha )$

$= { (\frac{ - b}{a} )}^{2} - 2( \frac{c}{a} )$

This is implied while finding the roots of a cubic polynomial.

Hope it helps you.