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# Unit: Complex numbers

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### About this unit

Learn about complex numbers and how to add, subtract, and multiply them. This will come in useful when working with polynomials.### 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!

Level up on the above skills and collect up to 400 Mastery points

### Practice

- Add & subtract complex numbersGet 3 of 4 questions to level up!
- Graphically add & subtract complex numbers Get 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!

Level up on the above skills and collect up to 320 Mastery points

Up next for you:

Level up on all the skills in this unit and collect up to 900 Mastery points!