Factorise:

Question:

Factorise:

$21 x^{2}+5 x-6$

Solution:

$21 x^{2}+5 x-6$

$=21 x^{2}+14 x-9 x-6$

$=7 x(3 x+2)-3(3 x+2)$

$=(3 x+2)(7 x-3)$

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