1. Complex Numbers Section 2.1

2. Objectives Rewrite the square root of a negative number as a complex number. Write the complex conjugate of a complex number. Add, subtract, multiply, and divide two complex numbers. Solve a quadratic equation with complex solutions.

3. Vocabulary complex number complex conjugate

4. Rewrite the following square root so that there is no longer a negative sign under the square root symbol.

7. Evaluate the expression

9. Multiply the following two numbers together.

10. Find the complex conjugate of each of the following:

11. Multiply the following two numbers together.

12. Evaluate the expression

13. Solve the equation: