Factorise :
$x^{2} + 2 x - 15$

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Solution

To Factorise : $x^{2} + 2 x - 15$
By splitting the middle term
$= x^{2} + 5 x - 3 x - 15$
$= x (x + 5) - 3 (x + 5)$
$= (x - 3) (x + 5)$
So, $x^{2} + 2 x - 15 = (x - 3) (x + 5)$

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