Quadratic Formula/Discriminant Test

The discriminant is

• aX²  + bX  +  c
• b - 4ac
• b² - 4ac
• b² + 4ac

Tags

CCSS.HSA-REI.B.4B

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.CED.A.1

CCSS.HSA.REI.B.4

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

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

Tags

CCSS.HSA-REI.B.4B

If the discriminant is positive, then the solution will be

• one real solution

• two real solutions

• no real solutions

• one imaginary solution

Tags

CCSS.HSA-REI.B.4B

Which graph has a discriminant = 0?

• None of them
• Red
• Blue
• Green

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.REI.D.11

A function has a discriminant of 25.

______________

How many solutions does it have?

• 0

• 1

• 2

• Infinite

Tags

CCSS.HSA-REI.B.4B

Will the following equation have an IMAGINARY answer
11x²-9x+3=0

• yes
• no

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

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

• 76

• 29

• 68

• none of these

Tags

CCSS.HSA-REI.B.4B

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

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

 $x^2-2x-8=0$  Solve using the Quadratic Formula:

•  $\frac{-1\pm\sqrt{73}}{6}$  

•  $-4,\ 2$  

•  $-2,\ 4$  

•  $-3,\ 2$  

Tags

CCSS.HSA-REI.B.4B