Question

Write the name of this equation​

Answer 1

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$\large{\sf{\pink{\underline{\underline{Formula}}}}}$

$(a + b + c) = {a}^{2} + {b}^{2} + {c}^{2} + 2ab + 2ac + 2bc$

$so, {a}^{2} + {b}^{2} + {c}^{2} = {(a + b + c)}^{2} - 2ab - 2bc - 2ac$

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Answer 2

I think this is Pythagoras expresion