Read,analyze, and solve each item below. Choose the letter of the correct answer.


1.In a quadratic equation, what do you call the value of b²–4ac?

A. Square Root
B. Radical
C. Numerator
D. Discriminant


2. What is the value of the Discrimination for the equation a²–2a–15=?


A. –80
B. –68
C. 88
D. 100


3. What is the nature of the roots for the equation b²–4b–21=0?


A. Real, Rational and Equal

B. Real, Irrational and unequal

C. Real, Rational and Unequal

D. Not real or imaginary


4. Which of the following equation has 0 as the value of its discriminant?


A. 5x²–8x–2=0

B. x²–6x÷5=0

C. x²–4x+4=0

D. 3x²–2x+1=0


5. Find m so that x²–6x+m=0 has one root.


A. –9

B. –3

C. 3

D. 9


6. Which of the following is used to find the sum of the roots of a quadratic equation?


A. b/a

B. c/a

C. – b/a

D. – c/a


7. What is the sum of the roots of b²–4b²–21=0?


A. 21

B. 4

C. –4

D. –21


8. Given the quadratic equation 6x²–12x+6=0, find the product of the roots.


A. 2

B. 1

C. –1

D. –2


9. If the sum of the roots of a quadratic equation is 2 and the product of the roots is 10 then which of the following equations can be formed?


A. x²+2x+10=0
B. x²–2x–10=0
C. x²+2x–10=0
D. x²–2x+10=0


10. Which quadratic equations can you form if the roots are –2 and –7?


A. x²–9x+14=0
B. x²–2x–7=0
C. x²+9x+14=0
D. x²–7x–2=0