Concepts in complex numbers

What does  $i^2$  equal?

•  $\sqrt{-1}$  

•  $-1$  

•  $-i$  

•  $1$  

√1

• ±1

• ±2

• ±3

• ±4

The value of  $i^2\ =$  

•  $1$  

•  $-1$  

•  $i$  

•  $-i$  

What is
 $i^2=$  

•  $-1$  

•  $1$  

•  $\sqrt{-1}$  

•  $-\sqrt{1}$  

Select all that apply.

• 10

• -10

• 10i

• -10i

What is the imaginary unit denoted by 'j' defined as?

• j=0

• j=1

• j=-1

• j raised to 2 =-1

• 8

• 64

• -64

• -8

What is the best name? √-1

• rational

• integer

• whole

• irrational

• imaginary (not real)