Discriminant and Quadratic Formula Practice

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

The discriminant is

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

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

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

Which graph has a discriminant = 0?

• None of them
• Red
• Blue
• Green

For the function below, is the discriminant positive, negative, or zero?

y = x² + 4x + 4

• Positive

• Negative

• Zero

Tags

CCSS.HSA-REI.B.4B

A function has a discriminant of 0.

How many x-intercepts (answers) does it have?

• 0 real

• 1 real

• 2 real

• 3 real

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

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

Square root of 16 is..

• 4 or -4
• 32
• 8
• 4

Tags

CCSS.8.EE.A.2

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