Question

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

Answer 1

$\textbf{Answer:}$


$a {b}^{2} + (a - 1)b - 1 \\ \\ = a {b}^{2} + ab - b - 1 \: (distributive \: property) \\ \\ =ab(b + 1) - (b + 1) \\ \\ = (b + 1)(ab - 1)$


$\textbf{Hope it helps you! }$

Answer 2

Hey there!

ab^2 + ab - b - 1

ab ( b + 1 ) - 1 ( b + 1 )

( ab - 1 ) ( b + 1 )

Hope my answer helps!