Learn how to add complex numbers with Khan Academy's easy-to-follow video lessons and practice exercises.

Add & subtract complex numbers VA.Math: A2.EO.4.c VA.Math.2023: A2.EO.4.c Google Classroom Microsoft Teams

We're asked to add the complex number 5 plus 2i to the other complex number 3 minus 7i. And as we'll see, when we're adding complex numbers, you can only add the real parts to each other and you …

Sal explains how we obtain complex numbers by adding real numbers and imaginary numbers.

And clearly, this complex number is made up of a real number plus an imaginary number. So just kind of talking in everyday terms, I called this the imaginary part.

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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, when …

Imagine a number that can square itself and become negative. Sounds impossible, right? But it's not. Complex numbers let you find solutions that real numbers can't, and they help you understand and …

Your answer should be a complex number in the form a + b i where a and b are real numbers.

Learn about the imaginary unit i, about the imaginary numbers, and about square roots of negative numbers.