Review of easy equation-solving techniques.

1. How many solutions are there to:

1/_{(x2 + 1)} = 0

2. What are the solutions of:

(x – 2)/_{(x2 + 1)} = 0

3. What are the solutions of:

x^{2} – 28 = 3x

4. What are the solutions of:

(x + 3)^{2} = 25

5. Solve: