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Please solve question no 20 first question..

Answer» SOLVE it USING
{a}^{3}  +  {b}^{3}  +  {c}^{3 } = (a + b + c)( {a}^{2 }   +  {b}^{2}  +  {c}^{2}  - ab - bc - ca)
it will HELP you out


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