Math 3 - Imaginary Numbers and Quadratic Formula Review

Simplify.

 $\sqrt{-4}$  

• 2i

• -2i

• 2

• 4i

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify.

 $\sqrt{-24}$  

•  $2\sqrt{6}$  
  

•  $-2\sqrt{6}$  
  

•  $2i\sqrt{6}$  

•  $6i\sqrt{2}$  
  

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

CCSS.HSN.RN.A.2

What does i² =  ?

• 1
• -1
• √-1
• √1

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify.

 $\sqrt{-10}\cdot\sqrt{-12}$  

•  $2i\sqrt{30}$  

•  $-2i\sqrt{30}$  

•  $2\sqrt{30}$  

•  $-2\sqrt{30}$  

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

CCSS.HSN.RN.A.2

Calculate: 

 $(1−2i)+(-4+2i)$  

• -3

• -3 − 4i

• 5 − 4i

• 5

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify: 

 $(10+15i)-(48-30i)$  

• 58 - 45i

• 58 - 15i

• -38 - 15i

• -38 + 45i

Tags

CCSS.HSA.APR.A.1

Simplify.

 $(4+3i)(4−3i)$  

• 16 − 9i

• 25

• 7

• 8 − 6i

Tags

CCSS.HSA.APR.A.1

Simplify:

 $(1−2i)(6+5i)$  

• 16 − 7i

• -16 + 7i

• -16 − 7i

• 16 + 7i

Tags

CCSS.HSA.APR.A.1

Simplify:

 $\frac{9}{5i}$  

•  $\frac{-12i}{5}$  
  

•  $\frac{-9i}{5}$  
  

•  $-i$  
  

•  $\frac{-6i}{5}$  

Tags

CCSS.HSA.APR.A.1

Simplify:

 $\frac{4-2i}{4+6i}$  

•  $\frac{2-3i}{13}$  
  

•  $\frac{1-8i}{20}$  
  

•  $\frac{1-8i}{13}$  

•  $\frac{7-8i}{13}$  
  

Tags

CCSS.HSA.APR.A.1