Question

$a{2} \: + 10a + 25$
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Answer 1

$\huge{\mathcal{\blue{\underline{Answer}}}}$

$= a {}^{2} + 10a + 25 \\ = a {}^{2} + 5a + 5a + 25 \\ = a(a + 5) + 5(a + 5)$

$\huge{\mathcal{\blue{\underline{(a+5)(a+5)}}}}$