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Factorisation by Common Factors

Factorise 5y...

Question

Factorise
$5 y^{2} + 5 y - 10$

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Solution

Consider $5 y^{2} + 5 y - 10$

$5 y^{2} + 5 y - 10 = 5 (y^{2} + y - 2)$

$= 5 (y - 1) (y + 2)$

$∴ 5 y^{2} + 5 y - 10 = 5 (y - 1) (y + 2)$

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