Quadratic Formula

What does the discriminant determine?

• Whether the graph goes up or down

• The vertex

• The number of Solutions

• The y-intercept

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 real

• 1 real

• 2 imaginary

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

• 2 real

• 1 real

• 2 imaginary

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

• 2 real

• 1 real

• 2 imaginary

What is the discriminant of this graph?

• Positive

• Zero

• Negative

What is the discriminant of this graph?

• Positive

• Zero

• Negative

What is the discriminant of this graph?

• Positive

• Zero

• Negative

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

• 44

• 65

• -15

• -144

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

• 36

• -11

• 13

• -20