Intro to complex numbers

Intro to complex numbers

by Jesus Molina

Multiple Choice

What complex number is shown on the graph?

• (-2,-3)

• -2-3i

• 2-3i

• 3i-2

Multiple Choice

Match the expression to the graph shown in the complex plane.

• -2i-3i

• (0,-5)

• -6i

• -2(3i)

Multiple Choice

What complex number is represented by the graph?

• -3-i
• -3+i
• 1+3i
• 1-3i

Multiple Choice

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

Multiple Choice

What does i² = ?

• -1
• √-1
• 1
• -√1

Multiple Choice

Simplify   i²³

• i
• -1
• 1
• -i

Multiple Choice

Multiply
(2i)(3i)

• 5i
• -5
• 6i
• -6

Multiple Choice

i¹³

• -1
• 1
• i
• -i

Multiple Choice

i⁷

• i
• -i
• 1
• -1

Multiple Choice

Add/Subtract using the proper rules:
2i + 3 + 7 - 12 i

• 10i - 10
• -10i + 10
• 14i + 10
• -10i + 4

Multiple Choice

i⁵²

• i
• -i
• 1
• -1

Multiple Choice

Calculate: 
(1 − 2i) + (-4 + 2i)

• -3
• -3 − 4i
• 5 − 4i
• 5