Solving Quadratic Equations

Which of the following is a quadratic equation?

• x = 2 and x = 3

• x = -2 and x = -3

• x = 5 and x = -6

• No solution

• x = -2 and x = -2

• x = 2 and x = -4

• x = 0 and x = -4

• No solution

• 9

• 6

• 36

• 3

• x = -4

• x = 2 and x = 4

• x = -2 and x = -4

• x = 6 and x = -8

• No real solutions

• x = 5 and x = -1

• x = 1 and x = -5

• x = 4 and x = -5

• No solution

• Two real solutions

• One real solution

• No real solutions

• x = ±2i

• x = ±2

• x = ±i

• No solution

• Factoring

• Completing the square

• Quadratic formula

• Square Root Property