How do you factor the expression $m^2+m-20$ ?

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Answer 1 · 2016-05-02T16:35:14

$(m + 5)(m - 4)$

Find the factors of 20 which subtract to give 1.

The signs in the brackets will be different, the greater number must be positive.

$5 xx 4 = 20$ $5 - 4 = 1$

How do you factor the expression m^2+m-20m^2+m-20?