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

Question

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

✓

Answer

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

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