Unit 2b Study Guide

Simplify the expression:
 $\left(8\ +\ 9i\right)\ +\ \left(4\ -\ 6i\right)$  

•  $17\ +\ 3i$  

•  $12\ +\ 3i^2$  

•  $17\ -2i$  

•  $12\ +\ 3i$  

Tags

CCSS.HSN.CN.A.2

Simplify the expression:
 $\left(5\ +\ 14i\right)\ -\ \left(10\ +\ 2i\right)$  

•  $5\ -16i$  

•  $-5\ +\ 16i$  

•  $5\ -\ 12i$  

•  $-5\ +\ 12i$  

Tags

CCSS.HSN.CN.A.2

(i)(3i)

• -3i
• -3
• 3
• 2i

Tags

CCSS.HSN.CN.A.2

What does i² = ?

• -1
• √-1
• 1
• -√1

Tags

CCSS.HSN.CN.A.1

(-3-i)(6-i)

• -21-7i
• -19-3i
• -15-5i
• -17-9i

Tags

CCSS.HSN.CN.A.2

Solve by factoring: x² + 3x - 18 = 0

• x = -3 and x = 6

• x = 3 and x = -6

• x = -9 and x = 2

• x = 9 and x = -2

Tags

CCSS.HSA-REI.B.4B

 $n^2+3n=0$  

•  $\left\{-3,0\right\}$  

•  $\left\{3,0\right\}$  

• No Real Solution

•  $\left\{-3,-1\right\}$  

Tags

CCSS.HSA-REI.B.4B

 $x^2-100=0$  

•  $\left\{25,4\right\}$  

•  $\left\{-50,2\right\}$  

•  $\left\{-10,10\right\}$  

•  $\left\{0,100\right\}$  

Tags

CCSS.8.EE.A.2

 $5x^2-12=17x$  

•  $\left\{-3,20\right\}$  

•  $\left\{-\frac{3}{5},\ 4\right\}$  

•  $\left\{-4,\ \frac{3}{5}\right\}$  

•  $\left\{-20,3\right\}$  

Tags

CCSS.HSA-REI.B.4B

 $m^2+15m+72=18$  

•  $\left\{12,\ 6\right\}$  

•  $\left\{-9,-6\right\}$  

•  $\left\{9,6\right\}$  

•  $\left\{9,\ -6\right\}$  

Tags

CCSS.HSA-REI.B.4B