Solve each equation. Check each answer to ensure that it does not include extraneous solutions. Be sure to show the work on these 4 problems. 25 points each

1. √ x-3=√ x+15 -2



2. √ x+16 = x -√ x+17



3. √ x-3-√x -2=1



4. √√ x-3=√ x-15