Question

$( {a}^{2} + {b}^{2} )$Formula
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Answer 1

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a² + b²

We already know that,

(a+b)² = a² + b² + 2ab

Then by following this,

we get,

a² + b² = (a+b)² - 2ab

Answer 2

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Formula for ( a² + b² ) →

( a - b )² + 2ab

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( a + b )² - 2ab