Discriminant and Quadratic Formula Practice

Identify the 'a' value: y = 16x² -8x -24

• 16

• 8

• -8

• -24

For the function above, is the discriminant positive, negative, or zero?

• Positive

• Negative

• Zero

• Not Sure

If the graph of a quadratic does not intercept the x-axis at any point, then it has:

• Real Solution

• Real Solutions

• Half a Solution

• No Real Solution

Use the quadratic formula to determine the solutions.

2x² - 9x - 35 = 0

• x = 7/2, x = -6

• x = -5/2, x =5

• x = -3/7, x =6

• x = -5/2, x = 7

Solve.

• A

• B

• C

• D

Solve Using the Quadratic Formula
 x² + 4x - 40 = -8

• -10 & -4

• -4 & 10

• -8 & 4

• 8 & -4

The discriminant of
2x² -3x - 5 is ?

• -10 and -3

• -31

• 49

• 31

Solve the equation x^2 + 11x + 28 = 0 using the quadratic formula. What are the solutions?

• x = -4, x = -7

• x = 4, x = 7

• x = -3, x = -9

• x = 3, x = 9

What is the value of the discriminant for the equation x^2 + 6x + 9 = 0?

• 0

• 9

• -9

• 36

Consider the equation 2x^2 + 8x + k = 0. What is the discriminant in terms of k?

• 64 - 8k

• 16 - 2k

• 64 - 2k

• 16 - 8k