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

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Solution

According to question,

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

$⟹ a b^{2} + a b - b - 1$

$⟹ a b (b + 1) - 1 (b + 1)$

$⟹ (a b - 1) (b + 1)$

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