Solve the equation: 4a2 = 16
Solve the equation: 3b2 – 9 = 0
Solve the equation: 8 – c2 = 5
Solve the equation: (x – 2)2 = 9
Solve the equation: 3 (x – 2)2 = 9
Solve the equation: 6 = 24 (x + 1)2