Hello everyone. I've got two problems that I'm trying to solve, but I just can't seem to get it. Could someone explain the solutions to me?

Here's the first one:

Solve where t is a real number. Simplify your answer as much as possible.

If there is more than one solution, separate them with commas.

And the second:

Solve the following equation for x by using the quadratic formula:

If there is more than one solution, separate them with commas.

Thanks so much, guys!