Answer
$4(t+1)(t+2)$
Work Step by Step
$\frac{4t+4}{t-3}\times(t^2-t-6)$
$=\frac{4(t+1)}{t-3}\times(t^2+2t-3t-6)$
$=\frac{4(t+1)}{t-3}\times[t(t+2)-3(t+2)]$
$=\frac{4(t+1)}{t-3}\times(t-3)(t+2)$
$=\frac{4(t+1)(t-3)(t+2)}{t-3}$
$=4(t+1)(t+2)$