How do you factor $s t^{2} - s t - 20 s$ $st^2 - st -20s$ ?

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Answer 1 · 2015-10-10T08:26:52

$s (t + 4) (t - 5)$ $s(t+4)(t-5)$

Take out s as a common factor s(t^2 -t-20)#

$= s (t^{2} - 5 t + 4 t - 20)$ $= s(t^2 -5t+4t-20)$

$= s (t (t - 5) + 4 (t - 5))$ $=s( t(t-5) +4(t-5) )$

$= s (t + 4) (t - 5)$ $= s(t+4)(t-5)$

How do you factor st2−st−20sst^2 - st -20s?