Exploring Operations with Complex Numbers

The video tutorial covers operations with complex numbers, including addition, subtraction, multiplication, and division. It begins with an introduction to complex numbers, explaining their real and imaginary parts. The tutorial then demonstrates how to add and subtract complex numbers by combining like terms. It proceeds to multiplication using the FOIL method and highlights the importance of recognizing the difference of squares. Finally, the video explains division by multiplying by the complex conjugate to eliminate the imaginary part in the denominator.

What is the real part of the complex number 2 + 3i?

• i

• 5

• 3

• 2

Tags

CCSS.HSN.CN.A.1

Which of the following is a purely imaginary number?

• 2

• 3 - 4i

• 0 + 5i

• 2 + 3i

Tags

CCSS.HSN.CN.A.1

How do you add the complex numbers 2 + 3i and 3 - 4i?

• 5 + 7i

• 5 - i

• 1 - i

• 5 - 7i

Tags

CCSS.HSN.CN.A.2

What is the result of subtracting 3 - 4i from 2 + 3i?

• -1 - 7i

• 1 - 7i

• -1 + 7i

• 1 + 7i

Tags

CCSS.HSN.CN.A.2

When multiplying 2 + 3i by 3 - 4i, what is the first step?

• Subtract the imaginary parts

• Multiply the real parts

• Multiply using FOIL method

• Add the real parts

Tags

CCSS.HSN.CN.A.2

What is the result of multiplying 2 + 3i by 3 - 4i?

• 18 + i

• 18 - i

• 18 + 12i

• 18 - 12i

What happens when you multiply 2 + 3i by 2 - 3i?

• You get a purely real number

• You get a purely imaginary number

• You get a complex number

• You get zero

Tags

CCSS.HSN.CN.C.8

What is the result of multiplying 2 + 3i by 2 - 3i?

• 13

• 4 + 9i

• 13i

• 4 - 9i

What is the purpose of multiplying by the complex conjugate in division?

• To get a real number

• To eliminate the imaginary part in the denominator

• To simplify the numerator

• To add the real parts

Tags

CCSS.HSN.CN.A.3

What is the result of dividing 3 + 3i by 2 + 3i?

• 6/13 + 9/13i

• 3/13 + 3/13i

• 6/13 - 9/13i

• 3/13 - 3/13i

Tags

CCSS.HSN.CN.A.3