The Quadratic Formula

• -6

• 3

• 1

• 0

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

Do you need to set the equation equal to zero before starting The Quadratic Formula?

• Yes!

• Only if you want to.

• No!

The discriminant is

• aX²  + bX  +  c
• b - 4ac
• b² - 4ac
• b² + 4ac

How many zeros does this parabola have? 

• 3
• 2
• 0
• 1

Use the quadratic formula to solve 2x² + 2x - 12=0

• -2 and 3

• 2 and 3

• 2 and -3

• -2 and -3

• (8, 0) and (-4, 0)

• (4, 0) and (-8, 0)

• (74, 0) and (-70, 0)

• (70, 0) and (-74, 0)

Solve the quadratic equation.
3x² - 8x - 8 = 0

• A    {0.38, -0.88} 
• B  {0.89, -8.9}
• C . {0.13, -0.63}
• D . {3.44, -0.77}