1. Daily Check For the equation, find the number of solutions using the quadratic formula.

2. Math I Day 12 (8-25-09) UNIT QUESTION: What is a quadratic function? Standard: MM2A3, MM2A4 Today’s Question: How do we multiply complex numbers? Standard: MM2N1.c, d

3. 1.3 Powers of i and Multiplying Complex Numbers

4. *For larger exponents, divide the exponent by 4, then use the remainder as your exponent instead. Example:

6. $25,000 Pyramid

7. -i1 i -i 1 i

8. $25,000 Pyramid -i1 i -i i

9. Multiplying Treat the i’s like variables, then change any that are not to the first power Ex: Ex:

10. Your Turn!

12. Conjugates: Two complex numbers of the form a + bi and a – bi are complex conjugates. The product is always a real number Ex:

13. Practice Workbook Page 14

14. Assignment Page 13 #1-25 (odd) Also, find the value for each of the following: i 45 i 52 i 25 i 74 i 91 i 102