Solve Quadratics with the Quadratic Formula

Solve using the quadratic formula

• A 

• B 

• C 

• D 

How many zeros does this parabola have? 

• 3

• 2

• 0

• 1

How many solutions does this graph have?

• one

• two

• no solutions

• cannot be determined

What is this formula?

• This is the speed of light formula.

• This is the quadratic formula.

• This is the zero product property.

• This is the least squares formula

Which of the following would be the best first step in using the quadratic formula to solve a quadratic equation?

• Identify A, B, and C

• Set one side of the equation equal to zero

Identify the values of A, B, and C

• A=1, B=7, C=-20

• A=10, B=7, C=20

• A=10, B=-7, C=-20

• A=10, B=7, C=-20

• No Solution, because of the negative under the square root.

Which of the following expressions represents the discriminant?

• ax² + bx + c

• b - 4ac

• b² - 4ac

• b² + 4ac

If the discriminant is positive, then the equation will have...

• one real solution

• two real solutions

• no real solutions

• one imaginary solution

Solve the quadratic equation.
2p² - 2p - 55 = 5

• .  {3.28, -2.28}

• .  {2.5, -1.78}

• . {6, -5}

• {-1, 4}