More Arithmetic with Complex Numbers

Select 2

• Correct

• Incorrect

• I substituted in the answer and it worked.

• I substituted in the answer and it did NOT work.

Find the correct expression in the form a+bi, where a and b are real numbers.

• 12-i

• 12-4i

• 12+i

• 12+4i

Find the correct expression in the form a+bi, where a and b are real numbers.

• 12+4i

• 28

• 12+0i

• 12-4i

Find the correct expression in the form a+bi, where a and b are real numbers.

• i+13

• 13i+1

• 1+13i

• 13+i

Find the correct expression in the form a+bi, where a and b are real numbers.

• -5+3i

• 5-3i

• -5-3i

• 5+3i

Find the correct expression in the form a+bi, where a and b are real numbers.

• 14

• 14i

• -14i

• -14

Which one doesn't belong?

• $i^2$

• $\left(1+i\right)+\left(1-i\right)$

• $\left(1+i\right)^2$

• $\left(1+i\right)\left(1-i\right)$

What is the value of  $i^0$  ?

•  $\sqrt{-1}$  

•  $-1$  

•  $1$  

•  $-\sqrt{-1}$  

What is the value of  $i^1$  ?

•  $\sqrt{-1}$  

•  $-1$  

•  $1$  

•  $-\sqrt{-1}$  

What is the value of  $i^2$  ?

•  $\sqrt{-1}$  

•  $-1$  

•  $1$  

•  $-\sqrt{-1}$