Question

Factorise
$3 {x}^{2} - 2x - 21$
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Answer 1

Step-by-step explanation:

$3 {x}^{2} - 2x - 21 \\ = 3 {x}^{2} - 9x + 7x - 21 \\ = 3x(x - 3) + 7(x - 3) \\ = (3x + 7)(x - 3)$

Here you go buddy. Best of luck