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