2. Complex Numbers Operations with Complex Numbers

3. What is the Imaginary Unit?

4. Try it!

5. What are imaginary and complex numbers? A complex number is a number composed of a real number and an imaginary number.

6. Examples of Complex Numbers A complex number is always written in standard form : a + bi, where a is the real part and bi is the imaginary part. 2 + 3i 5 – 5i

7. Plotting Complex Numbers The x-axis is all the real numbers The y-axis is all the complex numbers.

8. Plotting Complex Numbers 4 + 2i -1 + i - 4i 3 6 – 3i

9. Adding and Subtracting Complex Numbers

10. Steps for Adding and Subtracting Complex Numbers Step 1: Identify and combine like terms Step 2: Perform stated operation

11. Absolute Value of a Complex Number Let’s try it! Find the absolute value of the complex number 3 + 4i.

12. Classwork Access on the OLC OR Complete on paper