Test on Quadratic formula and discriminant nov 16

The discriminant is

• aX²  + bX  +  c

• b - 4ac

• b² - 4ac

• b² + 4ac

Determine the value of the discriminant and name the nature of the solution for the following:

x² + 2x - 63

Remember: b² - 4ac

• 256 - 2 reals - Rational

• √(-256 - 2 imaginary solutions

• √(137) - 2 reals - Irrational

• 123 - 2 reals - Rational

Find the discriminant of the following equation.

3x² -x- 2 = 0

• 5

• 25

• -24

• -26

What does the discriminant tell us?

• The maximum or minimum

• The y-intercept

• The number and type of solutions

• The axis of symmetry

A function has a discriminant of 0.
______________
How many x-intercepts does it have?

• 0

• 1

• 2

• 5

A function has a discriminant of -3.
______________
How many x-intercepts does it have?

• 0

• 1

• 2

• 3

A function has a discriminant of 4.
______________
How many x-intercepts does it have?

• 0

• 1

• 2

• 4

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

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

• 0

• 1

• 2

• 5

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

• -39

• 42

• -41

• none of these