1. Find the solutions of the following equation x - 3x - 40.
A. -5 and -8
B. 5 and -8
C. -5 and 8 D. 5 and 8
2. Solve for x in the equation x2 + x + 12.
A. 6 and -2
B. -3 and -4
C. - 4 and 3 D. -2 and 6
3. In the equation 2x2-2x - 12 = 0, the values of x are?
A-6 and 2
B.-3 and 4
C. - 4 and 3 D. -2 and 3
6. Solve for x by extracting square roots, x2 = 256
A. 14 and -14
B. 23 and -23 C. 16 and - 16 D. 18 and -10
7. By extracting square roots, 2x = 162,
A. 7 and -7
B. 9 and -9 C. 9 and -11 D. 11 and -11
8. In the equation 3x2 - 12 = 0, the roots are?
A. 2 and -2
B. 3 and -3 C. 4 and - 4 D. none of these
9. Solve for x by extracting square roots, 3x2 + 7 = 250.
A. 7 and -7
B. 9 and -9
C. 11 and -11 D. 12 and -12
10. In the equation x2 + 7x -120 = 0, the solutions are?
A. 12 and -10
B. - 20 and 6 C. 15 and -8 D. 8 and -15
11. In the equation x2 + 6x = 16, the roots are?
A. 8 and -2
B. -8 and 2
C. -8 and -2 D. 8 and 2
12. The roots of x? + 11x-60 = 0 are?
A. 8 and -2
B. -8 and 2 C.-8 and -2 D.-15 and 4
13. In the equation x2 + 18x + 81 = 0, the roots are?
A. 8 and -8
B. 9 and -9 C. 9 and 8
D. 9 and 9
14. In the equation x2 + 5x - 14 = 0, the solutions are?
A. 7 and -2
B. -7 and 2
C. 7 and 2
D. -7 and -2
15. The roots of 4x2 + 12x - 16 = 0 are?
A8 and -2
B. -4 and 1
C. 4 and -1
D. -8 and 2
16. In the equation x? +121 = 22x, the roots are?
A 9 and -9
B. 12 and -12 C. 11 and 11 D. 8 and 13
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Answer:
1. D
2. Equation has wrong values and signs.
3. D
6. C
7. B
8. D
9. B
10. D
11. B
12. D
13. Roots are both -9 (none of the choices?)
14. B
15. B
16. C
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