Complex Numbers and Analyzing the Discriminant

The discriminant is

• aX²  + bX  +  c

• b - 4ac

• b² - 4ac

• b² + 4ac

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

• 76

• -7

• 9

• none of these

What is the discriminant of 6x² − 2x − 3 = 0

• 76

• 29

• 68

• none of these

What is the discriminant for 5x² + x − 2 = 0

• -39

• 42

• -41

• none of these

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

• Positive

• Negative

• Zero

• Cannot be determined

If the discriminant is positive, then the solution will be

• one real solution

• two real solutions

• no real solutions

• one imaginary solution

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

• 0

• 1

• 2

• 5

Determine the value of the discriminant and name the nature of the roots for the following:
x² + 7x + 13
Remember:  b² - 4ac

• 400, 2 real root 

• 0, 1 real root with a multiplicity of 2

• -400, 2 imaginary roots

• -3, 2 imaginary roots

For the function below, is the discriminant positive, negative, or zero?___________y = x² + 4x + 4

• Positive

• Negative

• Zero

• Not Sure

Simplify
3i - (4 + 7i)

• -4 + 10i

• 21 - 12i

• 4 - 10i

• -4 - 4i