The Quadratic Formula, Imaginary numbers, & Discriminant

What is the following called? b²- 4ac

• Axis of symmetry
• Quadratic Formula
• Vertex
• Discriminant

Determine the values of
a, b, and c for
the quadratic equation: 
4x² – 8x = 3

• a = 4, b = -8, c = 3
• a = 4, b =-8, c =-3
• a = 4, b = 8, c = 3
• a = 4, b = 8, c = -3

Tags

CCSS.HSA.REI.B.4

What should you do first in solving this equation using the quadratic formula?
x² + 6x - 13 = 3

• Get factored form
• Write down: a=1, b=6, c=-13
• Make the equation equal 0 by subtracting 3 on each side
• Type it all in a calculator.

Tags

CCSS.HSA.REI.B.4

 2x² - x - 3 = 0
Find the discriminant.

• 25
• -23
• -25
• 0

Tags

CCSS.HSA.REI.B.4

Solve using the Quadratic Formula   3x² - 11x + 10 = 0

• -5/3 and -2
• 1 and 2
• 3/2 and 2
• 5/3 and 2

Tags

CCSS.HSA.REI.B.4

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

• -3/2 and 5
• No Solution
• -5 and 3/2
• 7/10 and 5

Tags

CCSS.HSA.REI.B.4

Solve using the Quadratic Formula

• A
• B
• C
• D

Tags

CCSS.HSA.REI.B.4

Solve using the Quadratic Formula: 2x² – 6x + 5 = 0 

• x=3/2±i/2
• x=3 ± i/2
• x=3/2 ± i
• x=3±i

Tags

CCSS.HSA.REI.B.4

If the discriminant = 0, it means a quadratic equation has ________________.

• two non-real solutions
• one real solution 
• two real solutions
• two irrational solutions

Tags

CCSS.HSA.REI.B.4

b²-4ac = 10 means the quadratic equation has ________________.

• 2 non-real solutions
• two real solutions
• a problem
• one real solution

Tags

CCSS.HSA.REI.B.4