A1 Unit 3 Pt 1 Test STUDY GUIDE

Find the missing value "c" to complete the square.

x² + 6x + ____

• 9

• 12

• 36

• - 9

Tags

CCSS.HSA-REI.B.4B

Use completing the square to solve the equation. After dividing both sides by 3 first, what would you then add to both sides of the equation to complete the square?

 $3x^2-60x+$  _____  $=\ 12\ +\$  _____

• 900

• 400

• 20

• 100

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 factoring
x² - 4x + 4 = 20,
what goes in the blank?
(x - __ )² = 20

• 4
• 2
• 8
• 20

Tags

CCSS.HSA-REI.B.4B

Solve by completing the square.
 $x^2-8x-20=0$  

•  $x=\left\{-2,\ 10\right\}$  

•  $x=\left\{-10,\ 2\right\}$  

•  $x=\left\{-20,\ -8\right\}$  

•  $x=\left\{8,\ 20\right\}$  

Tags

CCSS.HSA-REI.B.4B

Solve by completing the square.
 $x^2-4x-20=0$  

•  $x=\left\{\pm6\sqrt{2}-2\right\}$  

•  $x=\left\{\pm6\sqrt{2}+2\right\}$  

•  $x=\left\{\pm2\sqrt{6}+2\right\}$  

•  $x=\left\{\pm2\sqrt{6}-2\right\}$  

Tags

CCSS.HSA-REI.B.4B

7x² + 1 = 8

• ± 1
• ± 7
• ± √7
• ± 8

Tags

CCSS.8.EE.A.2

x² + 4 = 68

• ± 8
• ± √8
• 8
• ± 64

Tags

CCSS.8.EE.A.2

Solve by factoring: 5x² + 13x + 6 = 0

• x = -2 and x = -3/5
• x = 2 and x = 3/5
• x = -2 and x = 3/5
• x = 2 and x = -3/5

Tags

CCSS.HSA-REI.B.4B

Solve Using the Quadratic Formula $2x^2=-7x+15$  

•  $-\frac{3}{2}$   or 5

• No Solution

• -5 or $\frac{3}{2}$  

•  $\frac{7}{10}$   or 5