Question

Factorise this one -
3a2-1-2a

Answer 1

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$3a^2-1-2a$
$3a^2-2a-1$
$3a^2-3a+a-1$
$3a (a-1)+1(a-1)$
$(a-1)(3a+1)$
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Answer 2

Answer:

3a^2-2a-1

3a^2-3a+a-1

3a(a-1)+1(a-1)