Discriminant and Quadratic Formula (23)

1 The discriminant is

• aX² + bX + c

• b - 4ac

• b² - 4ac

• c² - 4ab

Tags

CCSS.HSA-REI.B.4B

1 What does the discriminant tell us?

• The maximum or minimum

• The y-intercept

• The number and type of solutions

• The axis of symmetry

Tags

CCSS.HSA-REI.B.4B

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

• 76

• 29

• 68

• none of these

Tags

CCSS.HSA-REI.B.4B

• a = 4, b = -8, c = 3

• a = -8, b =4, c =3

• a = 4, b = -8, c = -3

• a = -8, b = 4, c = -3

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

What is the discriminant and how many solutions would this quadratic have?

-8x² + 6x - 4 = 0

• -92, No Solutions

• 164, 2 Solutions

• -164, No Solutions

• 92, 2 Solutions

Tags

CCSS.HSA-REI.B.4B

What is the discriminant and how many solutions would this quadratic have?

-3x² - 5x + 15 = 7

• 205, 2 Solutions

• -71, No Solutions

• 121, 2 Solutions

• 121, 1 Solution

Tags

CCSS.HSA-REI.B.4B

Solve Using the Quadratic Formula 
2x² + 7x - 15 = 0

• -1.5 or 5
• No Solution
• -5 or 1.5
• 0.7 or 5

Tags

CCSS.HSA-REI.B.4B

Name "c" for the equation 4x² - 5x - 7 = 10

• 7
• -17

• -5
• -3

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

If there are two real solutions, the discriminant is

• zero

• a postive number

• a negative number

• a perfect square

Tags

CCSS.HSA-REI.B.4B

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

• -10 & -4
• -4 & 10
• -8 & 4
• 8 & -4

Tags

CCSS.HSA-REI.B.4B