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Unit: Complex numbers
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About this unit
Complex numbers are built on the idea that we can define the number i (called "the imaginary unit") to be the principal square root of -1, or a solution to the equation x²=-1. From this starting point evolves a rich and exciting world of the number system that encapsulates everything we have known before: integers, rational, and real numbers.Learn
Practice
- Simplify roots of negative numbersGet 3 of 4 questions to level up!
- Powers of the imaginary unitGet 3 of 4 questions to level up!
Learn
Practice
- Parts of complex numbersGet 3 of 4 questions to level up!
- Classify complex numbersGet 3 of 4 questions to level up!
Practice
- Plot numbers on the complex planeGet 3 of 4 questions to level up!
Practice
- Add & subtract complex numbersGet 3 of 4 questions to level up!
Learn
Practice
- Multiply complex numbers (basic)Get 3 of 4 questions to level up!
- Multiply complex numbersGet 3 of 4 questions to level up!
Practice
- Solve quadratic equations: complex solutionsGet 3 of 4 questions to level up!
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Level up on all the skills in this unit and collect up to 900 Mastery points!