f(x) = (x + 4)(x − 2)^2  Use the x-intercepts (zeros) and test numbers to find the intervals on which the graph of f(x) is above the x-axis (positive) and the intervals on which the graph is below the x-axis (negative)

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter3: Polynomial Functions
Section3.2: Polynomial Functions Of Higher Degree
Problem 3ECP
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f(x) = (x + 4)(x − 2)^2

 Use the x-intercepts (zeros) and test numbers to find the intervals on which the graph of f(x)
is above the x-axis (positive) and the intervals on which the graph is below the x-axis (negative)

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