Solving Quadratic Equations, Quiz 7, Level 3

Solving Quadratic Equations, Quiz 7, 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. -2x2 + (-16x) + (-3) = 0
x = -7.81 and x = -0.19
x = 0.19 and x = 7.81
x = -8.18 and x = 0.18
x = -15.62 and x = -0.38

2. Solve the equation. -5x2 + (-10x) + 3 = 0
x = -0.26 and x = 2.26
x = -1.63 and x = -0.37
x = -2.26 and x = 0.26
x = -4.53 and x = 0.53

3. Solve the equation. x2 + (-20x) + (-5) = 0
x = 0.25 and x = -20.25
x = 19.75 and x = 0.25
x = 20.25 and x = -0.25
x = 40.49 and x = -0.49

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

5. Solve the equation. 0*x2 + (-20x) + (-1) = 0
x = 0
x = 8.65 and x = 0.34
x = 0.05
x = -8.65 and x = 0.34

6. Solve the equation. 3x2 + 9x + (-3) = 0
x = 3.3 and x = -0.3
x = -0.38 and x = -2.62
x = 0.3 and x = -3.3
x = 0.61 and x = -6.61

7. Solve the equation. 2x2 + 3x + (-4) = 0
x = 0.85 and x = -2.35
x = 2.35 and x = -0.85
x = -2.35 and x = -0.85
x = 1.7 and x = -4.7

8. Solve the equation. 0*x2 + (-x) + 1 = 0
x = -1
x = -1.62 and x = 0.62
x = 1
x = 0

9. Solve the equation. 5x2 + 6x + 2 = 0
x = -0.27 and x = -1.47
x = 0.27 and x = -1.47
No real solutions
x = 0.27 and x = 1.47

10. Solve the equation. x2 + (-2x) + (-3) = 0
x = 1 and x = -3
x = 3 and x = -1
x = -1 and x = -3
x = 6 and x = -2

Score =
Correct answers: