Graded Bw #8

Solve
(x+3)²-5 = 9

• ±√14 -3
• √14 - 3
• ±11
• ±5

Tags

CCSS.HSA-REI.B.4B

• A
• B
• C
• D

Tags

CCSS.8.EE.A.2

Solve by taking square roots:
k² - 6 = 43

• k = √37
• k = 37 or - 37
• k = 7, k = -7
• no solution

How many zeros does this parabola have based on the graph? 

• 3
• 2
• 0
• 1

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

Which is the discriminant?

• b² - 4ac
• -b/2a
• (-b±√(b² - 4ac))/(2a)
• (b/2)²

Tags

CCSS.HSA-REI.B.4B

How many x-intercepts does the parabola have?(hint: use the discriminant)
y = 3x² - 2x + 1

• none
• 1 real 
• 2 real 
• 2 imaginary

How many x-intercepts does the parabola have?(hint: use the discriminant)
y = 2x² + 3x - 7

• none
• 1 real 
• 2 real
• 2 imaginary

For the function below, is the discriminant positive, negative, or zero?
___________
y = 2x² + 5x + 3

• Positive
• Negative
• Zero
• Not Sure

Tags

CCSS.HSA-REI.B.4B

The quadratic formula is... 

• x= -b +- √(b² -4ac)) ÷2a
• x= -b +- √(b² +4ac)) ÷2a
• x= b +- √(b² -4ac)) ÷2a
• x= b² +- √(b² -ac)) ÷2a