Solving Quadratic Equations, Quiz 9, Level 3

Solving Quadratic Equations, Quiz 9, Level 3

Click on the correct answer choice. (Where appropriate, answers are to the nearest hundredth.) When you have completed the quiz, press the "Get Score" button.

1. Solve the equation. x2 + 11x + 1 = 0
x = -0.09 and x = -10.91
x = 10.91 and x = 0.09
x = 0.09 and x = -11.09
x = -0.18 and x = -21.82

2. Solve the equation. -5x2 + (-5x) + (-5) = 0
x = -1.62 and x = -0.62
x = -1.62 and x = 0.62
x = 1.62 and x = 0.62
No real solutions

3. Solve the equation. 5x2 + 3x + 0 = 0
x = 0.6 and x = 0
x = 0 and x = -0.6
x = 0 and x = -0.6
x = 0 and x = -1.2

4. Solve the equation. 2x2 + 11x + (-3) = 0
No real solutions
x = 0.26 and x = -5.76
x = -0.29 and x = -5.21
x = 0.52 and x = -11.52

5. Solve the equation. -5x2 + 4x + 4 = 0
x = -0.58 and x = 1.38
x = -1.16 and x = 2.76
x = -1.38 and x = 0.58
x = 1.38 and x = 0.58

6. Solve the equation. 4x2 + (-9x) + 5 = 0
x = -1 and x = -1.25
x = 2.71 and x = -0.46
x = 1.25 and x = 1
x = 2.5 and x = 2

7. Solve the equation. -4x2 + (-10x) + (-3) = 0
x = -2.15 and x = -0.35
x = 0.35 and x = 2.15
x = -2.77 and x = 0.27
x = -4.3 and x = -0.7

8. Solve the equation. -2x2 + 16x + (-1) = 0
x = 0.06 and x = 7.94
x = 0.13 and x = 15.87
x = -7.94 and x = -0.06
x = -0.06 and x = 8.06

9. Solve the equation. -2x2 + 17x + 2 = 0
x = -8.62 and x = 0.12
x = -0.12 and x = 8.62
x = 0.12 and x = 8.38
x = -0.23 and x = 17.23

10. Solve the equation. -5x2 + (-10x) + 5 = 0
x = -0.41 and x = 2.41
x = -1 and x = -1
x = -2.41 and x = 0.41
x = -4.83 and x = 0.83

Score =
Correct answers: