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# Unit 4: Complex numbers

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### Learn

### Practice

- Powers of the imaginary unitGet 3 of 4 questions to level up!
- Simplify roots of negative numbersGet 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!
- Plot numbers on the complex planeGet 3 of 4 questions to level up!

### Learn

### 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!

### Learn

### Practice

- Complex number conjugatesGet 3 of 4 questions to level up!
- Divide complex numbersGet 3 of 4 questions to level up!

### Learn

### Practice

- Modulus (absolute value) of complex numbersGet 3 of 4 questions to level up!
- Angle of complex numbersGet 3 of 4 questions to level up!

### Learn

### Practice

- Complex numbers from absolute value & angleGet 3 of 4 questions to level up!
- Polar & rectangular forms of complex numbersGet 3 of 4 questions to level up!

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