Quadratic Formula and the Discriminant

The discriminant of
2x² -3x - 5 is ?

• -10 and -3

• -31

• 49

• 31

Tags

CCSS.HSA-REI.B.4B

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

• Positive

• Negative

• Zero

Tags

CCSS.HSA-REI.B.4B

Use the discriminant to determine the number of solutions 4x² + 4x + 1 = 0 has?

• 0

• 1

• 2

• More than 2

Tags

CCSS.HSA-REI.B.4B

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

• -39

• 42

• -41

• none of these

Tags

CCSS.HSA-REI.B.4B

Which is FALSE about the graph pictured?

• The discriminant is negative.

• The y-intercept is (0, -1).

• The discriminant is 0.

• The A value is negative.

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

• -10 & -4

• -4 & 10

• -8 & 4

• 8 & -4

Tags

CCSS.HSA-REI.B.4B

Use the quadratic formula to find the solutions for
y = -x² - 5x + 12

• -4.9 and -0.1

• -8.54 and 8.54

• -0.45 and 3.55

• -6.77 and 1.77

Tags

CCSS.HSA-REI.B.4B

How many roots does this parabola have?

• 3

• 2

• 0

• 1

Tags

CCSS.HSF-IF.C.7A