Intro to Complex Numbers

√-81

• 9i

• -9i

• -9

• 9

Simplify.

• 10

• -10

• 10i

• -10i

What does √-1 = ?

• 1

• -1

• i

• i²

√-4

• -2

• -2i

• 2

• 2i

What is a complex number?

• A combination of a real number and an imaginary number

• A real number only

• An imaginary number only

• Any number you can think of

An imaginary number is also part of which of the following set of numbers?

• Real

• Whole

• Irrational

• Complex

• Rational

The Complex Field consists of:

• a) Only real numbers.

• b) Only imaginary numbers.

• c) Both real and imaginary numbers.

• d) Only rational numbers.

What letter usually represent imaginary number?

• a

• i

• j

• x

Simplify

• -4 - i

• -4 + i

• -4

• i - 4

Simplify.

• A

• B

• C

• D