College Algebra / Unit 4 Alg 184 short lesson, about 20 seconds
Adding and Subtracting Complex Numbers
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The idea
Complex numbers add and subtract by combining real parts with real parts and imaginary parts with imaginary parts.
In practice
(3 + 2i) + (1 − 5i) = 4 − 3i — the same like-terms discipline that collects polynomials, with i marking the like kind. Nothing crosses the aisle.
Your place on the trail
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Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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