Quadratic Formula Review Fall 2023

What is another word that describes the zeroes of a quadratic function?  

• y-intercepts
• vertex
• x-intercepts
• maximum

What is the discriminant?

• b²-4ac
• b²/2a
• 4ac
• b²±4ac

Solve     4x² + 12x + 11 = 0

• -2.2 or -0.8
• -2 or -1
• 2 or 1
• No Solution

Solve    2x² + 7x - 15 = 0

• -1.5 or 5
• No Solution
• -5 or 1.5
• 0.7 or 5

Solve by factoring: x² - 9x + 20 = 0

• x = -4 and x = -5
• x = 20 and x = -9
• x = 4 and x = 5
• x = -4 and x = 5

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

• -2, 3
• 2, 3
• 2, -3
• -2, -3

Solve x² - 2x - 8 = 0 using the quadratic formula

• x = 2 , -3

• x = 4 , -2

• x = 2 , -4

• x = 3 , -2

• No Solution

Solve 4x² - 2x + 4 = 0 using the quadratic formula

• x = 2, -1

• x = 3, -1

• x = 1, -2

• x = 1, -3

• No Solution

Solve 2r² - 3r -5 = 0 using the quadratic formula

• x = 1/2, -2

• x = 5/2, -1

• x = 2, -1/2

• x = 1, -5/2

• No Solution

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

• -2, 3

• 2, 3

• 2, -3

• -2, -3