Factorise: x^2-22 x+117 - Vidyadip

Question

Factorise:
$x^2-22 x+117$

✓

Answer

$x^2-22 x+117$
$=x^2-13 x-9 x+117$
$\{117=(-13) \times(-9),-22=-13-9\}$
$=x(x-13)-9(y-13)$
$=(x-9)(x-13)$

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