Quadratic Equations Review for Test

Solve for x using your calculator

x² + 6x + 8 = 0

• x = -2, -4

• x = 2, 4

• x = 8, 1

• x = -8, -1

Solve for x using your calculator

x² + 18 = 9x

• x = 3, 6

• x = -3, -6

• x = -3, 6

• x = -6, 3

Tags

CCSS.HSA-REI.B.4B

Identify the values of A, B, and C

10p² + 7p - 20 = 0

• A=1, B=7, C=-20

• A=10, B=7, C=20

• A=10, B=-7, C=-20

• A=10, B=7, C=-20

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

What is the first step to solving THIS equation by completing the square?
a² + 10a + 21 = 0

• Set the equation equal to zero
• Divide 10 by 2 and add the result to both sides
• Add a² and 10a together
• Subtract the 21

Tags

CCSS.HSA-REI.B.4B

When completing the square what should the next line look like

x² + 6x = 5

• $\left(x+3\right)^2=5$

• $\left(x+6\right)^2=31$
  

• $\left(x+3\right)^2=14$
  

Tags

CCSS.HSA-REI.B.4B

Solve for x

 $\left(x-3\right)^2=5$  

•  $x=3\pm\sqrt{5}$  

•  $x=-3\pm\sqrt{5}$  

•  $x=8$  

•  $x=\pm\sqrt{5}$  

Tags

CCSS.HSA-REI.B.4B

Find the roots using the quadratic formula

• A

• B

• C

• D

Tags

CCSS.HSA-REI.B.4B

Solve by completing the square

• A

• B

• C

• D

Tags

CCSS.HSA-REI.B.4B

What are the factors of
25x² - 81?

• (5x - 9)(5x + 9)
• (5x - 9)(5x - 9)
• (5x + 9)(5x + 9)
• Cannot be factored

Tags

CCSS.HSA.APR.C.4