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Factorise:x2+...

Question

Factorise:
x² + 20x – 69

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Solution

$x^{2} + 20 x - 69 = x^{2} + 23 x - 3 x - 69 = x (x + 23) - 3 (x + 23) = (x + 23) (x - 3)$

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Q. Factorise:
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x^{2} - 2 \sqrt{3} x - 24

Factorise:
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