Solve the following equations by the method of completion of a square.

7x² – 13x – 2 = 0

Find the roots of each of the following quadratic equations if they exist by the method of completing the squares:

x² + x + 3 = 0

Solve the following equations by the method of completion of a square.

5x² – 24x – 5 = 0

Solve the following equations by the method of completion of a square.

15x² + 53x + 42 = 0

Solve the following equations by the method of completion of a square.

7x² + 2x – 5 = 0