Question

Factorise:
$a{b}^2+b(a-1)-1$

Answer 1

Factorise

$a{b}^2+b(a-1)-1$

$\Rightarrow a{b}^2+ba-b-1$

$\Rightarrow ab(b+1)-1(b+1)$

$\Rightarrow (b+1)(ab-1)$

Hence, this is answer.