Complex Numbers and Their Properties

Complex Numbers and Their Properties

Assessment

Interactive Video

Mathematics

9th - 10th Grade

Hard

Created by

Thomas White

FREE Resource

The video tutorial explains how to find the square roots of complex numbers, specifically focusing on the example of 5 + 12i. It begins by setting up the problem and defining the necessary equations. The tutorial then expands these equations and equates the real and imaginary parts to solve them simultaneously. Through factorization, the solutions for x and y are found, leading to the final complex number solutions. The video concludes with a summary of the results and encourages viewers to subscribe for more content.

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main topic of the video?

Finding square roots of real numbers

Understanding imaginary numbers

Finding square roots of complex numbers

Solving linear equations

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the complex number for which we need to find the square roots?

2 + 3i

7 + 8i

5 + 12i

3 + 4i

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in finding the square roots of a complex number?

Set the complex number equal to z

Square both sides of the equation

Divide the complex number by 2

Find the conjugate of the complex number

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When expanding the equation, what is the real part of z^2?

2xy

x^2 - y^2

5 + 12i

x^2 + y^2

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What condition must hold for two complex numbers to be equal?

Their magnitudes must be equal

Both their real and imaginary parts must be equal

Their imaginary parts must be equal

Their real parts must be equal

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the imaginary part of z^2?

x^2 - y^2

2xy

12

5

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the equation formed by equating the real parts?

2xy = 12

x^2 + y^2 = 12

x + y = 6

x^2 - y^2 = 5

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