Algebra 1 Quadratic Equations

What is the discriminant of -2x² − x − 1 = 0

• 76

• -7

• 9

• none of these

A function has a discriminant of 25.
______________
How many solutions does it have?

• 0

• 1

• 2

• 5

If the discriminant is equal to -2, how many solutions are there?

• No Solutions

• 1 Solution

• 2 Solutions

• Infinite Solutions

Which quadratic equation models the parabola shown?

• y = (x-2)(x-5)

• y = (x+2)(x+5)

• y = -(x+2)(x+5)

• y = -(x-2)(x-5)

What are the x-intercepts of the quadratic?

• (2, 0) and (4, 0)

• (-2, 0) and (-5, 0)

• (2, 0) and (5, 0)

• (-2, 0) and (-4, 0)

Which equation matches the x-intercepts x=5,-7 ?

• (x+5)(x-7)=0

• (x-5)(x+7)=0

• (x+5)(x+7)=0

• (x-5)(x-7)=0

Solve using Factoring:

• -3, 4

• -4, 3

• -4, -3

• 3, 4

Select the equation that would graph the parabola.

• y = -1/2x² + 2x+ 6

• y = 1/2x ² +2x-6

• y = -1/2x² - 2x + 6

• y = 1/2x² -2x -6