Quadratic Formula / Discriminant

What is the discriminant in the Quadratic Formula?

• -b + 4ac

• b - 4ac

• -b² - 4ac

• b² - 4ac

If the discriminant is positive, how many solutions does the graph have?

• 2

• 1

• 0

If the discriminant is negative, how many solutions does the graph have?

• 2

• 1

• 0

If the discriminant is zero, how many solutions does the graph have?

• 2

• 1

• 0

Find the discriminant: 2a² - 5a + 5 = 0

• 44

• 65

• -15

• -144

Find the discriminant: 3k² + k - 1 = 0

• 36

• -11

• 13

• -20

How many real solutions does 3k² + k - 1 = 0 have?

• 2

• 1

• 0

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 a² - 4a + 4 = 0 using the quadratic formula

• 2

• -2

• 4

• -4

• No Solution