4. What is the value of “b” in the equation x² - 9 = 0 ?

6. How many real roots does the quadratic equation x² + 25 = 0 have?

7. If the discriminant is equal to 121, then the nature of the roots is ?

8. Which of the following is NOT a method in solving a quadratic equation?

9. What do you call the graph of quadratic function?

10. What is the sum of the roots of the quadratic equation 2𝑥² + 12𝑥 − 5 = 0 ?

11. In the quadratic formula  $\frac{-b\pm\sqrt{b^2-4ac}}{2a}$ , find the discriminant of  $x^2\ -\ 4x\ +\ 4\ =\ 0$  

12. Which of the following is a mathematical sentence in a Quadratic Inequality?

13. If m and n are the roots of the quadratic equation 𝑥² − 10𝑥 + 9 = 0, then what is the

value of 𝑚𝑛 + 𝑚 + 𝑛 ?

14. Rewrite the function f(x) = 2x² + 8x + 5 in the form f(x) = a(x – h)² + k.

15. What is the standard form of (x - 5) (x + 3) + 9 = -7 ?

16. If Ramon can clean the garage in 3 hours, but it takes Jane 4 hours to do the same job. How long would it take them to clean the garage if they worked together?

17. The area of a rectangular lot is 56m². If the length is six more than twice the width, what are the dimensions of the rectangle?