Factorise: -5-10 t+20 t^2 - Vidyadip

Question

Factorise:
$-5-10 t+20 t^2$

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Answer

$-5-10 t+20 t^2$
$=-5\left(1+2 t-4 t^2\right)(\text { HCF of } 5,10,20=5)$

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