You have solved a radical equation. What should you do to check whether your proposed solution is​ correct?

You should check your proposed solution in any of the equations you found while looking for the solution.

You​ don't need to check whether your proposed solution is correct. You know you followed the proper​ method, so it should be fine.

You should check the proposed solution in the original equation.

You should check the proposed solution in the back of the book because it is always right.