Answer
$(t+2)(t-3)$
Work Step by Step
$t^2-t-6=t^2+2t-3t-6$ (notice that $-t=2t-3t$)
$t^2-t-6=t(t)+2(t)+(-3)t+(-3)2=t(t+2)-3(t+2)=(t+2)(t-3)$
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