Algebra 2

What is the discriminant?

• b²-4ac

• b²/2a

• 4ac

• b²±4ac

What is this?

• This is the speed of light formula.

• This is the quadratic formula.

• This is the zero product property.

• This is scary.

What is the discriminant?

3x² + 3x + 7 = 0

• -75

• -39

• 75

• 39

What is step one in using the quadratic formula to solve a problem?

• Identify A, B, and C

• Plug A, B, and C into the formula

• a = 2 , b = 3, c = -5

• a = 2, b = -3, c = -5

• a = 2, b = -3, c = 5

• a = -2, b = 3, c = 5

• Square root

• Quadratic formula

• X-intercepts

• Discriminant 

Solve using the quadratic formula: 2x² - 2x - 60 = 0

• {6, -2}

• {6, -5}

• {-1, 4}

Interpret the following question. How do the discriminant and the quadratic formula support each other? What does each do?