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Factorisation by Regrouping Terms

Factorise : x...

Question

Factorise : $x^{2} - (b - 2) x - 2 b$

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Solution

$x^{2} - (b - 2) x - 2 b = x^{2} - b x + 2 x - 2 b = x (x - b) + 2 (x - b) = (x - b) (x + 2)$

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Factorisation by Regrouping Terms

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