Complex Numbers

 $i^3$ 

• 1

• -1

•  $i$  
  

•  $-i$  
  

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

 $i^9$ 

• 1

• -1

•  $i$  
  

•  $-i$  
  

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

 $i^{15}$ 

• 1

• -1

•  $i$  
  

•  $-i$  
  

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

 $i^{20}$ 

• 1

• -1

•  $i$  
  

•  $-i$  
  

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

 $i^{106}$ 

• 1

• -1

•  $i$  
  

•  $-i$  
  

Tags

CCSS.HSF-IF.C.8B

Another way to express $\sqrt{-1}$  is?

• 1

• -1

• i

• 0

• 5 - 12i

  Real part = 5

  Imaginary part = -12

• Yes, Johnson is correct because all his steps are clear 

• No, Johnson is not correct because from Step1 to Step2, he did not do the distributive property correctly. 

• Yes, Johnson is correct because his answer is a complex number 

• No, Johnson is not correct because from step2 to Step3, he forgot to change the sign to + 6. 

Simplify 
 $\sqrt{-36}$  

• -6

• i√3

• 6i

• 6

What does i² = ?

• -1
• √-1
• 1
• -√1