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Factorise:x2-...

Question

Factorise:
x² – 26x + 133

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Solution

$x^{2} - 26 x + 133 = x^{2} - 19 x - 7 x + 133 = x (x - 19) - 7 (x - 19) = (x - 19) (x - 7)$

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