Math Problem Statement

Use the Leading Coefficient Test to determine the graph's end behavior for the polynomial function f(x) = -x^2(x - 2)(x + 4).

Solution

Let's examine the polynomial function provided in the question:

f(x)=x2(x2)(x+4)f(x) = -x^2(x - 2)(x + 4)

The question asks you to determine the graph's end behavior using the Leading Coefficient Test.

Key Points:

  1. Degree of the polynomial:

    • We can expand f(x)f(x) to analyze its degree.
    • The highest power of xx comes from multiplying x2(x2)(x+4)x^2(x - 2)(x + 4), resulting in x4-x^4.
    • Thus, this is a 4th-degree polynomial.
  2. Leading coefficient:

    • The leading term is x4-x^4.
    • The negative sign indicates the leading coefficient is negative.

End Behavior Based on Degree and Leading Coefficient:

  • Even Degree (4): The ends of the graph go in the same direction.
  • Negative Leading Coefficient: Since the leading coefficient is negative, the graph falls as it approaches both ++\infty and -\infty.

Thus, the correct end behavior is:

  • The graph falls to the left and falls to the right.

Answer:

  • The correct choice is A: "The graph of f(x)f(x) falls to the left and falls to the right."

Would you like any additional details or clarifications?


Here are five related questions:

  1. How does the degree of a polynomial influence the graph's end behavior?
  2. What happens to the graph of a polynomial when the leading coefficient is positive?
  3. How can you determine the turning points of a polynomial function?
  4. What is the significance of the sign of the leading coefficient in graphing polynomials?
  5. Can the degree of a polynomial be odd, and how would that affect the end behavior?

Tip: Always check both the degree and the leading coefficient when using the Leading Coefficient Test!

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Math Problem Analysis

Mathematical Concepts

Algebra
Polynomial Functions
Leading Coefficient Test
End Behavior

Formulas

f(x) = -x^2(x - 2)(x + 4)
Degree of polynomial = 4
Leading term = -x^4

Theorems

Leading Coefficient Test
End Behavior of Polynomials

Suitable Grade Level

Grades 10-12