Review Quadratic Formula

What does the discriminant determine?

• Whether the graph goes up or down

• The vertex

• The number of Solutions

• The y-intercept

The quadratic equation can be used to solve quadratic equations that cannot be factored.

• True

• False

Solve using the quadratic formula.
2x² - 9x - 35 = 0

• x = 7/2, x = -6

• x = -5/2, x =5

• x = -3/7, x =6

• x = -5/2, x = 7

What is the discriminant and how many solutions would this quadratic have? x² - 6x + 9 = 0

• 0, No Solutions

• 0, 1 Solution

• 72, 2 Solutions

• -72, No Solution

• No Solution

What are the solutions to x² - 3x = 5?

• x = -1.19, 4.19

• x = -4.19, 1.19

• x = -2.39, 8.39

• x = -8.39, 2.39

• x = 1.19, 4.19

Solve 8x² + 22x = -15

• -3.32, 0.57

• -0.375, -0.33

• 1.25, 1.5

• -1.5, -1.25

Which graph has a discriminant = 0?

• None of them

• Red

• Blue

• Green

If the discriminant is positive, then the solution will be

• one real solution

• two real solutions

• no real solutions

• all real numbers