3.6 Using the Quadratic Formula and the Discriminant

3.6 Using the Quadratic Formula and the Discriminant

Sunday, January 10

Multiple Choice

The discriminant is

• A. aX² + bX + c

• B. b - 4ac

• C. b² - 4ac

• D. b² + 4ac

Multiple Choice

Solve using the quadratic formula. f(x) = 2x²- 4x + 7

• A. (2±2i√10)/2

• B. (4±√40)/4

• C. (2±i√10)√/2

• D. (2±2i√40)/4

Multiple Choice

• A

• B

• C

• D

Multiple Choice

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

• A. -2, 3

• B. 2, 3

• C. 2, -3

• D. -2, -3

Multiple Choice

Determine the value of the discriminant and describe the number and type roots for the following:

x² + 7x + 13

• A. 101, 2 real roots

• B. 3, 2 real roots

• C. -101, 2 imaginary roots

• D. -3, 2 imaginary roots

Multiple Choice

Determine the values of

a, b, and c for

the quadratic equation:

4x² – 8x = 3

• A. a = 4, b = -8, c = 3

• B. a = 4, b =-8, c =-3

• C. a = 4, b = 8, c = 3

• D. a = 4, b = 8, c = -3

Multiple Choice

____________

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

• A. Positive

• B. Negative

• C. Zero

• D. Not Sure

Multiple Choice

____________

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

• A. Positive

• B. Negative

• C. Zero

• D. Not Sure

Multiple Choice

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

• A. x = -2, 3

• B. x = 2, 3

• C. x = 2, -3

• D. x = -2, -3

Multiple Choice

Determine the value of the discriminant and describe the number and type roots for the following:

x² + 7x + 13

• A. 101; 2 real roots

• B. 3; 2 real roots

• C. -101; 2 imaginary roots

• D. -3; 2 imaginary roots