Question

Can someone help :(!

Answer 1

1/(t+4)²

Explanation:

`(t+3)/(t+4)/(t^2+7t+12)=(t+3)/(t+4)\cdot(1)/((t+3)(t+4))=((t+3))/((t+3)(t+4)^2)\\\\=\boxed{(1)/((t+4)^2)}`