Complex Numbers Quiz

Simplify.

• -5i
• 5
• 5i
• -5

Another way to express √-1 is?

• 1

• -1

• i

• 0

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

The complex conjugate of 4 + 3i is

• 3 + 4i

• 3 - 4i

• 4 - 3i

• 4 + 3i

Tags

CCSS.HSN.CN.A.3

(3 + 2i) + (4 - 5i)

• 7 + 7i

• 1 - 3i

• 1 - 7i

• 7 - 3i

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 does i² equal?

• -1

• √-1

• 1

• -√1

Tags

CCSS.HSN.CN.A.1

Simplify   i²³

• i
• -1
• 1
• -i

Tags

CCSS.HSN.CN.A.2

Simplify  $\sqrt{-32}$  

•  $-2\sqrt{2}$  

•  $2i\sqrt{2}$  

•  $4i\sqrt{2}$  

•  $-4\sqrt{2}$  

 $Simplify\ \ \ \left(5-7i\right)\left(1+5i\right)$  

• 40 + 32i

• 40 + 18i

• -30 - 18i

• -30 - 32i

Tags

CCSS.HSN.CN.A.2