Imaginary Numbers - Intro

Front

What is an imaginary number?

Back

An imaginary number is a number that can be written as a real number multiplied by the imaginary unit 'i', where i is defined as the square root of -1.

Front

What does i^2 equal?

Back

i^2 = -1.

Front

Simplify: (2 - 4i) + (5 + 6i)

Back

7 + 2i.

Front

What letter usually represents the imaginary unit?

Back

The letter 'i'.

Front

Simplify: (4 + 7i) - (3 + 2i)

Back

1 + 5i.

Front

What is the value of i^79?

Back

-i.

Front

What is the real part of a complex number?

Back

The real part of a complex number is the component that does not involve the imaginary unit 'i'.

Front

What is the imaginary part of a complex number?

Back

The imaginary part of a complex number is the component that involves the imaginary unit 'i'.

Front

How do you add two complex numbers?

Back

To add two complex numbers, add their real parts and their imaginary parts separately.

Front

How do you subtract two complex numbers?

Back

To subtract two complex numbers, subtract their real parts and their imaginary parts separately.