complex numbers

What letter represents an imaginary number?

• a

• i

• j

• x

What does i² equal?

• -1

• √-1

• 1

• -√1

How do you write a complex number?

• a-bi

• a+bi

• ai+b

• ai-b

• True

• False

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

5+8i What is the real part?

• 5

• 8

• 8i

• 58

8-2i What is the imaginary part

• 8

• 2

• -2

• 82

-4+7i What is the real part

• 7i

• 7

• -4

• 4

What is the imaginary part: 4-2i

• 2i

• -2i

• -2

• 2