1. Which of the following is the quadratic formula ?

a x =
b. x =
c. x =
d. x =
2. To use the quadratic formula, the equation must be in the form ___________________ .
a. ( x- c ) ² = 0
b. x² + bx = c
c. a x² + bx + c = 0
d. ax² = c
3. In the quadratic equation 3x² - 4x -7 = 0, what are the values of a, b and c ?
a. a = 3 ; b = 4 ; c = 7
b. a = 3 ; b = 4 ; c = -7
c. a = 3 ; b = -4 ; c = -7
d. a = 3 ; b = -4 c = 7
4. What is the value of b² - 4ac in the quadratic equation 3x² -4x - 7 = 0 ?
a. 100
b. 68
c. -68
d. -84
5. What is the standard form of the quadratic equation 4x² = 5x - 1 ?
a. 4x² - 5x = 1
b. 4x² - 5x -1 = 0
c. 4x² + 5x + 1 = 0
d. 4x² - 5x + 1 = 0
II. Enhancing Skills : Complete the solution to solve x² + 6x = 16 by using the Quadratic Formula .
x² + 6x = 16 Given equation
1 Standard Form with a = 1 ; b = 6 ; c = -16

x = Quadratic Formula

2 x = Substitute the values of a , b and c


3 x = Simplify
4 x =
5 x =

6 x = ___ or x = ____ Solutions
III. Mastering Concept and Skills : Solve 2x² + 2x - 1 = 0 by using the Quadratic Formula
Solution :