1. When solving #30 and #34 on page 156, you must “complete the square.”

2. Check even answers for p.156

3. Check even answers for p.156

4. 4-1 Polynomial Functions
Find the zero of a function.
Find the root of an equation.
Find the x-intercepts of the graph.
All of these are solved the same way by setting the equation equal to zero, then solving for x.

5. Complex number: a + bi
real #
imaginary #
Reminders: a. b. c.

6. The degree (highest exponent) of an equation indicates the possible number of complex roots (which includes real and/or imaginary.)
Example 1:
4th degree: so it has 4 complex roots
graph crosses x-axis twice, so 2 real roots
The other 2 roots are imaginary

7. Example 2:
4th degree 4 complex roots
graph crosses x-axis 4 times, so there are 4 real roots