Essential Questions How do we identify, evaluate, add, and subtract polynomials? How do we classify and graph polynomials?

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Presentation transcript:

Essential Questions How do we identify, evaluate, add, and subtract polynomials? How do we classify and graph polynomials?

Throughout this chapter, you will learn skills for analyzing, describing, and graphing higher-degree polynomials. Until then, the graphing calculator will be a useful tool.

Example 1: Graphing Higher-Degree Polynomials on a Calculator Graph each polynomial function on a calculator. Describe the graph and identify the number of real zeros. From left to right, the graph increases, then decreases, and increases again. From left to right, the graph increases, then decreases, then increases, then decreases again. It crosses the x-axis 3 times, so there appear to be 3 real zeros. It crosses the x-axis 4 times; 4 real zeros.

Example 2: Graphing Higher-Degree Polynomials on a Calculator Graph each polynomial function on a calculator. Describe the graph and identify the number of real zeros. From left to right, the graph increases, then decreases slightly, and increases again. From left to right, the graph decreases, then increases. It does not cross the x-axis, so there are no real zeros. It crosses the x-axis 3 times, so there appear to be 3 real zeros.

Example 3: Graphing Higher-Degree Polynomials on a Calculator Graph each polynomial function on a calculator. Describe the graph and identify the number of real zeros. From left to right, the graph decreases, then increases, then decreases, and then increases again. From left to right, the graph decreases then increases. It crosses the x-axis twice, so there appear to be 2 real zeros. It crosses the x-axis 4 times, so there are four real zeros.

Lesson 3.1 Practice B