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# Unit 1: Get ready for complex numbers

900 possible mastery points

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## About this unit

Imagine a number that can square itself and become negative. Sounds impossible, right? But it's not. Complex numbers let you find solutions that real numbers can't, and they help you understand and model many phenomena in nature, science, and art. In this unit, you'll learn how to create, manipulate, and visualize complex numbers, and how they relate to other areas of math.### 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!

### 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!

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!