Quadratic Formula

Determine the values of a, b, and c for the quadratic equation:

4x² – 8x = 3

• a = 4, b = -8, c = 3

• a = 4, b =-8, c =-3

• a = 4, b = 8, c = 3

• a = 4, b = 8, c = -3

Use the graph to determine the solutions.

• -1 and -3
• 1 and -3
• 1 and 3
• -1 and 3

Solve Using the Quadratic Formula

 $x^2\ +\ 4x\ -\ 40\ =\ -8$  

•  $x\ =\ -10\ ,-4$  

•  $x\ =\ -4\ \ ,\ 10$  

•  $x\ =\ -8\ \ ,\ 4$  

•  $x\ =\ 8\ ,-4$  

Answer explanation

 $\frac{\left(-4\ \ \pm\ \ \sqrt{144}\right)}{2}$  

What are the solutions to the quadratic equation

 $x^2-6x-30=10$  ?

•  $x=10,\ x=4$  

•  $x=10,\ x=-4$  

•  $x=-10,\ x=4$  

•  $x=-10,\ x=-4$  

Solve Using the Quadratic Formula
 x² + 4x - 40 = -8

• -10 & -4
• -4 & 10
• -8 & 4
• 8 & -4

Identify the values of A, B, and C

11r² + 6r = 6

• A=11, B=-6, C=-6

• A=11, B=6, C=6

• A=11, B=6, C=-6

• A=1, B=6, C=-6