Simplifying Imaginary and Complex Numbers

The video tutorial explains how to simplify expressions using complex numbers. It begins with a review of complex numbers, which consist of a real part and an imaginary part. The tutorial then demonstrates how to simplify square roots of negative numbers by introducing the imaginary unit 'i', defined as the square root of -1. Through examples, the video illustrates the process of simplifying expressions like the square root of -36 and -50, and the expression 3 - the square root of -4, emphasizing the importance of correctly positioning 'i' in the final expression.

What is the form of a complex number?

• A + BI

• A - B

• A - BI

• A + B

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CCSS.HSN.CN.A.1

What is the value of i squared?

• 0

• -1

• 1

• i

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CCSS.HSN.CN.A.1

How do you simplify the square root of a negative number?

• By ignoring the negative sign

• By factoring out -1 and using i

• By taking the absolute value

• By squaring the number

What is the simplified form of √-36?

• -6i

• 6

• 6i

• -6

What is the prime factorization of 50?

• 1 x 50

• 2 x 5 x 5

• 5 x 10

• 2 x 25

What is the simplified form of √-50?

• 5√2

• 5i√2

• 5√-2

• 5i

Where should the 'i' be placed when simplifying square roots of negative numbers?

• To the left of the square root

• To the right of the square root

• It doesn't matter

• Inside the square root

What is the simplified form of 3 - √-4?

• 3 - 2

• 3 - 2i

• 3 + 2i

• 3 + 2

Tags

CCSS.HSN.CN.A.1

What is the value of √-1?

• -i

• 1

• -1

• i

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CCSS.HSN.CN.A.1

What is the perfect square factor of 4?

• 2

• 1

• 8

• 4