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Factorisation by Regrouping Terms

Simplify: x2...

Question

Simplify:
$x^{2} - 33 x + 90$

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Solution

Now,
$x^{2} - 33 x + 90$
$= x^{2} - 30 x - 3 x + 90$
$= (x - 30) (x - 3)$ .

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