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# Unit 5: Complex numbers

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## About this unit

Use your imagination and complexity (?) and dive into the world of complex numbers. Add, subtract, multiply, & divide complex numbers. Plot them on the complex plane and convert between rectangular and polar forms.### 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!

### 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!

### Practice

- Distance of complex numbersGet 3 of 4 questions to level up!
- Midpoint of complex numbersGet 3 of 4 questions to level up!

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

### 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!

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

### 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!
- Complex numbers from absolute value & angleGet 3 of 4 questions to level up!

### Learn

### Practice

- Polar & rectangular forms of complex numbersGet 3 of 4 questions to level up!

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

### Learn

### Practice

- Multiply & divide complex numbers in polar formGet 3 of 4 questions to level up!
- Powers of complex numbersGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 160 Mastery points

Up next for you:

Level up on all the skills in this unit and collect up to 1900 Mastery points!