© 2008  Rasmus ehf  and Jóhann Ísak Pétursson

Equations III   Quiz 1

Instructions.

Read each question carefully and choose the answer that you think is most likely to be correct. You can only choose one answer for each question. When you are ready, mark your answers in the spaces on the computer screen and click on the button 'Send answers'. Good luck!

Solve the following equations putting a check mark by the correct answer:

1.                              3x2 = 0

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Possible answers:
A 0
B 1/3 and  −1/3 
C 1 and −1
D
not possible

2.                           3x2 − 12 = 0

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Possible answers:
A 2
B 0 and 2
C 2 and -2
D
not possible

3.                         3x2 − 12x = 0

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Possible answers:
A 2
B 0 and 4
C 4 and -4
D not possible

4.                               3x2 − 12x + 12 = 0

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Possible answers:
A 2
B 0 and 2
C 4 and -4
D not possible

5.                                  3x2 − 12x + 24 = 0

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Possible answers:
A 2
B 0 and 4
C 4 and -4
D not possible

6.                               3x2 − 12x − 15 = 0

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Possible answers:
A 5
B -1 and 5
C and
D not possible

7.                            3x2 − 12x − 12 = 0

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Possible answers:
A 2
B
C
D not possible

8.                                0,3x2 + 0,4x − 0,4 = 0

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Possible answers:
A 0,2
B -2 and  2/3
C 0,4 and −0,2
D
not possible

9.                                     0,2x2 + 0,4x + 0,4 = 0

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Possible answers:
A 0,2
B -2 and 2
C
D not possible

10.                          −0,2x2 + 0,4x + 0,4 = 0

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Possible answers:
A 0,2
B -2 and 2
C
D not possible

 

Percentage answered correctly =

Correct answers:

Your answers: