Factorise: x^2-11 x-42 - Vidyadip

Question

Factorise:
$x^2-11 x-42$

✓

Answer

$x^2-11 x-42$
$=x^2-14 x+3 x-42$
$\{-11 = -14 + 3, -42 = -14 × 3\}$
$= x(x - 14) + 3(x - 14)$
$= (x - 14)(x + 3)$

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