Factorise the following. x^2+ 9x + 20 - Vidyadip

Question

Factorise the following. $x^2+ 9x + 20$

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Answer

$x^2+ 9x + 20$
$= x^2+ 5x + 4x + 5 × 4$
$= x(x + 5) + 4(x + 5)$
$= (x + 5)(x + 4)$

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