Complex Numbers and Their Operations

This video tutorial explains how to add and subtract expressions using complex numbers. It begins with an introduction to complex numbers, defining them in the form of 'a + bi', where 'a' is a real number and 'bi' is an imaginary number. The tutorial then demonstrates how to simplify square roots of negative numbers using the imaginary unit 'i', which is the square root of -1. Examples are provided to illustrate the process of simplifying square roots and performing arithmetic operations with complex numbers, including subtraction and addition. The video concludes with a summary of the examples and encourages further practice.

What is the standard form of a complex number?

• a + bi

• a / b

• a - b

• a * b

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CCSS.HSN.CN.A.1

What is the value of 'i' in complex numbers?

• The square root of 1

• The square root of -1

• The square root of 2

• The square root of 0

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

• By multiplying by 2

• By adding 1

• By using the factor of -1 under the square root

• By subtracting 1

What is the simplified form of the square root of -36?

• 6

• -6i

• 6i

• -6

What is the simplified form of the square root of -121?

• 11

• -11

• -11i

• 11i

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CCSS.HSN.CN.A.2

What is the result of subtracting 11i from 6i?

• 5i

• -5i

• 17i

• -17i

What is the simplified form of the square root of -49?

• -7i

• 7i

• -7

• 7

What is the simplified form of the square root of -81?

• -9

• -9i

• 9i

• 9

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CCSS.HSN.CN.A.2

What is the result of adding -7i and 9i?

• -16i

• 2i

• -2i

• 16i

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CCSS.HSN.CN.A.1

What is the sum of the real parts 7 and -11?

• 18

• -18

• -4

• 4

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CCSS.HSN.CN.A.1