Question
Factorise:
$6 x^2-5 x-21$
$6 x^2-5 x-21$
✓
Answer
$6 x^2-5 x-21$
$=6 x^2+9 x-14 x-21$
$=3 x(2 x+3)-7(2 x+3)$
$=(3 x-7)(2 x+3)$
$=6 x^2+9 x-14 x-21$
$=3 x(2 x+3)-7(2 x+3)$
$=(3 x-7)(2 x+3)$
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