Question

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$is \: there \: any \: formule \: of \: {a}^{2} + {b}^{2}$
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Answer 1

it depends upon the question to use a formula you can use any one of these...

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Answer 2

$\huge\mathfrak{Hello}$

answer

${a}^{2} + {b}^{2} = ({a + b})^{2} - 2ab$

$\huge\mathfrak{Hope\: this\: help}$