Teamwork Vocabulary Work

Which of the following is not true about an imaginary unit?

• It is represented by i

• The definition is a complex number whose square is -1

• It's called imaginary because Mrs. Lane made it up.

Which of the following is an example of a pure imaginary number?

• 12i

• 3

• 72+6i

• 4x

The complex conjugate of 7-4i would be

Where would you graph 3+4i on the complex number plane?

What is the imaginary part of the number 9?

• i

• 0

• 3i

What is the definition of a complex number?

• number pairs of the form a+bi and a-bi

• is identical to the coordinate plane, except each ordered pari (a,b) represents the complex number a+bi

• complex number whose square is -1

• the real numbers and imaginary numbers

Which vocabulary word's definition is a complex number is its distance from the origin on the complex number plane?

• absolute value of a complex number

• complex conjugate

• imaginary unit

• pure imaginary number

5-3i is an example of what?

• imaginary unit

• complex conjugate

• complex number

• complex number plane

• 25

• 15+20i

• 35

Are 7+2i and 2+7i complex conjugates?

• Yes

• No