5. What is the quadratic equation given the values of a = 1, b= 0 c=47
A. x2 + 4 = 0
C. 4x2 - 1 = 0
B x2 - 4 = 0
D. 4x2 + 1 = 0
6. What are the roots of the quadratic equation x2 - 121 = 0?
A. 1 and 121
C. 11 and - 11
B. 1 and -121
D. 11 and 11
7. What are the roots of the quadratic equation x2 + 15x + 56 = 0?
A. 7 and 8
C. -7 and - 8
B. -7 and 8
D. 7 and -8
8. Which of the following roots of a quadratic equation is a perfect square?
A. -4
C. 5
B. 2
D. 9
9. Which of the following roots of a quadratic equation is a NOT a real number?
A. -4
C.-7/10
B. 14
D. -9
10. Which is NOT a root of a quadratic equation x2 + 7x + 12 = 0?
A. -4
C.-3
B 7
D. A and C
11. What is the value of the discriminant of a quadratic equation x2+7x+12= 0?
A. -1
C. 1
B 0
D. 2
12. What is the value of the discriminant of a quadratic equation x2+x+1= 0?
A. -4
C. -2.
B. -3
D. -1
13. The value of the discriminant of a quadratic equation is zero. What is the
nature of the roots of the quadratic equation?
A. real numbers and equal
C. irrational numbers and not equal
B: rational numbers and not equal D. no real roots
14. The value of the discriminant of a quadratic equation is perfect square. What
is the nature of the roots of the quadratic equation?
A. real numbers and equal
C. irrational numbers and not equal
B. rational numbers and not equal D. no real roots
15. Your classmate answered that nature of the roots of a quadratic equation
which has the value of -9 is rational and not equal. Is the answer correct?
A. Yes, because -9 is a perfect square
B. Yes, because the discriminant is -9
C. No, because -9 is not a perfect square
D. No, because -9 is less than zero and no real roots​