How would you solve #2 on this practice exam

http://faculty.uml.edu/rbrent/131/spE1.pdf

Show the steps please.(Talking)

a)
Find common denominator, multiply both sides by denominator. Solve basic equation for x. The answer is 1/2 if you need a reference.

b)
Add 5 to both sides, square both sides, add 4 to both sides, take square root.

2. c) is a quadratic equation if you let , giving . Solve for using the Quadratic Formula, then use this to evaluate .