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.

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CCSS.HSN.CN.A.1

Front

What does i^2 equal?

Back

i^2 = -1.

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CCSS.HSN.CN.A.1

Front

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

Back

7 + 2i.

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CCSS.HSN.CN.A.2

Front

What letter usually represents the imaginary unit?

Back

The letter 'i'.

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CCSS.HSN.CN.A.1

Front

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

Back

1 + 5i.

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CCSS.HSN.CN.A.2

Front

What is the value of i^79?

Back

-i.

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CCSS.HSN.CN.A.2

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'.

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CCSS.HSN.CN.A.1

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'.

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CCSS.HSN.CN.A.1

Front

How do you add two complex numbers?

Back

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

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CCSS.7.NS.A.1C

Front

How do you subtract two complex numbers?

Back

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

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CCSS.HSN.CN.A.2