Question

Factorise the following using identity a2 +b2+ 2ab = (a + b)2
i. x² +14x +49​

Answer 1

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$\star \rm \: \: \: {x}^{2} + 14x + 49$

$\implies \rm \: {x}^{2} + 2 \times (x)(7) + {7}^{2}$

$\implies \rm \: {(x + 7)}^{2}$