Question
Factorise:
6x2 - 5x - 21
6x2 - 5x - 21
✓
Answer
6x2 - 5x - 21
= 6x2 + 9x - 14x - 21
= 3x(2x + 3) - 7(2x + 3)
= (3x - 7)(2x + 3)
= 6x2 + 9x - 14x - 21
= 3x(2x + 3) - 7(2x + 3)
= (3x - 7)(2x + 3)
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