Math Problem Statement

The graph of a polynomial function y = p(x) is shown. Which of the following expressions could define p(x)?

Solution

Let's analyze the graph and the problem.

The graph of p(x)p(x) has the following characteristics:

  1. Roots: The graph crosses the x-axis at x=3x = -3 and x=2x = 2. This means these values are roots of the polynomial p(x)p(x).
  2. Behavior near the roots:
    • At x=3x = -3, the graph touches the x-axis and bounces off. This indicates that x=3x = -3 is a root with even multiplicity (likely a square, (x+3)2(x + 3)^2).
    • At x=2x = 2, the graph also touches the x-axis and bounces off. This indicates that x=2x = 2 is a root with even multiplicity (likely (x2)2(x - 2)^2).

Now, let’s analyze the options:

  • A. (x3)(x+2)(x - 3)(x + 2): The roots would be x=3x = 3 and x=2x = -2, which do not match the graph.
  • B. (x+3)(x2)(x + 3)(x - 2): The roots would be x=3x = -3 and x=2x = 2, but the graph shows even multiplicities for these roots, and this option only provides multiplicity 1.
  • C. (x3)2(x+2)2(x - 3)^2(x + 2)^2: The roots are x=3x = -3 and x=2x = 2, both with even multiplicities. This matches the behavior of the graph.
  • D. (x+3)2(x2)2(x + 3)^2(x - 2)^2: The roots are x=3x = -3 and x=2x = 2, both with even multiplicities. However, the factors here are reversed from what is needed to match the graph.

Thus, the correct answer is C. (x3)2(x+2)2(x - 3)^2(x + 2)^2.

Would you like a further breakdown or have any questions?


Here are 5 related questions to consider:

  1. How do you determine the multiplicity of roots from a graph?
  2. What happens to the graph of a polynomial at roots with odd versus even multiplicities?
  3. Can the degree of a polynomial be determined from its graph?
  4. How would the graph change if one of the roots had multiplicity 3 instead of 2?
  5. How do you construct a polynomial if you are given its graph?

Tip: Always analyze the behavior of the graph at its roots to determine the multiplicity of each factor in the polynomial.

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Math Problem Analysis

Mathematical Concepts

Polynomial Functions
Roots of Polynomials
Multiplicity of Roots

Formulas

p(x) = (x - root1)^multiplicity1 * (x - root2)^multiplicity2

Theorems

Roots and Multiplicity Theorem

Suitable Grade Level

Grades 9-12