Factorise: x^2-(a+b) x+a b - Vidyadip

Question

Factorise:
$x^2-(a+b) x+a b$

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Answer

$x^2-(a+b) x+a b$
$=x^2-a x-b x+a b$
$=x(x-a)-b(x-a)$
$=(x-a)(x-b)$

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