Quizizz: 5-1 Complex Numbers

Simplify.

 $\sqrt{-36}$  

•  $-6$  
  

•  $6i$  
  

•  $\sqrt{-6}$  
  

•  $i\sqrt{6}$  

Simplify.

 $\sqrt{-40}$  

•  $4i\sqrt{10}$  

•  $i\sqrt{40}$  

•  $2i\sqrt{10}$ 

•  $10i\sqrt{2}$  

Simplify.

 $\sqrt{-96}$  

•  $-2\sqrt{24}$  
  

•  $-4\sqrt{6}$  
  

•  $2i\sqrt{24}$  
  

•  $4i\sqrt{6}$  
  

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: $\left(1\ +\ 3i\right)\ +\ \left(7\ -\ 2i\right)$  

• 8+i

• i+8

• 8+5i

• 5i+8

Tags

CCSS.HSN.CN.A.2

A complex number can be expressed as a + bi. What does a represent?

• the real part of the complex number

• the imaginary part of the complex number

• depends on the sign of the number

• the square root of the complex number

Tags

CCSS.HSN.CN.A.1

Simplify

(12 - 4i) + (-2 + 8i)

• 8 + 104i

• 10 + 4i

• 14 - 4i

• 10 - 12i

Tags

CCSS.HSN.CN.A.2

Simplify the expression:
 $\left(5\ +\ 4i\right)\ -\ \left(-1\ -\ 2i\right)$  

•  $6\ +6i$  

•  $4\ +\ 2i$  

•  $6\ -\ 6i$  

•  $4\ -\ 2i$  

Tags

CCSS.HSN.CN.A.2

(4 - 2i) - (3 + 6i)

• 7 - 4i

• 1 + 4i

• 1 - 8i

• 7 - 8i

Tags

CCSS.HSN.CN.A.2

What is the standard form of a complex number?

•  $ai-b$  

•  $a+bi$  

•  $ai+b$  

•  $bi+a$  
  

Tags

CCSS.HSN.CN.A.1