Solving Quadratic Equations, Quiz 4, Level 3

Solving Quadratic Equations, Quiz 4, 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 + (-9x) + (-5) = 0
x = 0.59 and x = 8.41
x = -9.52 and x = 0.52
x = -8.41 and x = -0.59
x = -16.81 and x = -1.19

2. Solve the equation. 4x2 + 14x + (-5) = 0
x = 3.83 and x = -0.33
x = 0.33 and x = -3.83
x = -0.4 and x = -3.1
x = 0.65 and x = -7.65

3. Solve the equation. 3x2 + 2x + 0 = 0
x = 0.67 and x = 0
x = 0 and x = -0.67
x = 0 and x = -1.33
x = 0 and x = -0.67

4. Solve the equation. -3x2 + (-4x) + 0 = 0
x = 0 and x = 1.33
x = -1.33 and x = 0
x = -2.67 and x = 0
x = -1.33 and x = 0

5. Solve the equation. 5x2 + (-13x) + 1 = 0
x = 5.04 and x = 0.16
x = 2.52 and x = 0.08
x = -0.08 and x = -2.52
x = 2.67 and x = -0.07

6. Solve the equation. 0*x2 + 20x + (-1) = 0
x = -0.05 and x = -19.95
No real solutions
x = 0
x = 0.05

7. Solve the equation. -5x2 + (-17x) + (-3) = 0
x = 0.19 and x = 3.21
x = -3.57 and x = 0.17
x = -6.43 and x = -0.37
x = -3.21 and x = -0.19

8. Solve the equation. -4x2 + (-2x) + 5 = 0
x = -2.79 and x = 1.79
x = -1.4 and x = 0.9
x = -0.9 and x = 1.4
x = -0.9 and x = -1.4

9. Solve the equation. -3x2 + 6x + (-2) = 0
x = 0.42 and x = 1.58
x = -1.58 and x = -0.42
x = -0.29 and x = 2.29
x = 0.85 and x = 3.15

10. Solve the equation. 4x2 + (-20x) + (-3) = 0
x = 0.15 and x = -5.15
x = 4.85 and x = 0.15
x = 10.29 and x = -0.29
x = 5.15 and x = -0.15

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