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Factorisation by Regrouping Terms

Factorize: x...

Question

Factorize:
$x^{2} - 9 x + 20$

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Solution

Now,
$x^{2} - 9 x + 20$
$= x^{2} - 4 x - 5 x + 20$
$= (x - 4) (x - 5)$ .

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