y^ 2 5y 24 =y^ 2 8y+3y 24 =y(y 8)+3(y 8) =(y 8)(y+3) Hence, #160; y^ 2 5y 24=(y 8)(y+3) . ...

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Factorisation by Common Factors

Factorise: y...

Question

Factorise:
$y^{2} - 5 y - 24$

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Solution

$y^{2} - 5 y - 24 = y^{2} - 8 y + 3 y - 24 = y (y - 8) + 3 (y - 8) = (y - 8) (y + 3)$

Hence, $y^{2} - 5 y - 24 = (y - 8) (y + 3)$ .

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