1
Given the value of x is the root of the quadratic equation by substitution. Which of the following is not the root of the quadratic equation?
-
- x2 – 2x – 8 = 0; x = 4
-
- x2 – 4x – 2 = 0; x = 2
-
- 4x2 – 9x + 2 = 0; x = 2
-
- 3x2 + 5x – 2 = 0; x = -2