
Multiplying complex numbers (article) | Khan Academy
Learn how to multiply two complex numbers. For example, multiply (1+2i)⋅ (3+i). A complex number is any number that can be written as a + b i , where i is the imaginary unit and a and b …
Multiplying complex numbers (video) | Khan Academy
Discover how to multiply complex numbers! Just like multiplying regular numbers, you can use the distributive property or FOIL method. Remember, the imaginary unit 'i' squared equals -1. So, …
Visualizing complex number multiplication - Khan Academy
Learn how complex number multiplication behaves when you look at its graphical effect on the complex plane.
Complex numbers | Algebra 2 | Math | Khan Academy
We'll learn what imaginary and complex numbers are, how to perform arithmetic operations with them, represent them graphically on the complex plane, and apply these concepts to solve …
Multiplying complex numbers in polar form - Khan Academy
I'll show here the algebraic demonstration of the multiplication and division in polar form, using the trigonometric identities, because not everyone looks at the tips and thanks tab.
Complex number conjugates (video) | Khan Academy
Multiplying a complex number by its conjugate results in a real number. This is useful for simplifying complex numbers and is similar to the difference of squares.
Complex numbers | Algebra (all content) | Math | Khan Academy
This topic covers: - Adding, subtracting, multiplying, & dividing complex numbers - Complex plane - Absolute value & angle of complex numbers - Polar coordinates of complex numbers
Intro to complex number conjugates (video) | Khan Academy
Learn about the conjugate of complex numbers, how to add and divide using conjugates, and the key property that multiplying a complex number by its conjugate produces a real number.
Complex number operations review (article) | Khan Academy
Review complex number addition, subtraction, and multiplication. ... Want to learn more about complex number operations? Check out these videos:
Multiplying complex numbers (article) | Khan Academy
Learn how to multiply two complex numbers. For example, multiply (1+2i)⋅(3+i).