Factorise
${a b}^{2} - {b c}^{2} - a b + c^{2}$

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Solution

According to given question ,

$a b^{2} - b c^{2} - a b + c^{2}$

$⟹ a b (b - 1) - c^{2} (b - 1)$

$⟹ (b - 1) (a b - c^{2})$

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