The graph of f(x) = 2x + 6x2 – 90x + 21 has two horizontal tangents. What is the negative value of x where a horizontal tangent occurs? What is the positive value of x where a horizontal tangent occurs?

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
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Chapter3: Functions
Section3.6: Absolute Value Functions
Problem 2SE: How can you tell whether an absolute value function has two x-intercepts without graphing the...
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The graph of f(x) = 2x + 6x2
90x + 21 has two horizontal tangents.
|
What is the negative value of x where a horizontal tangent occurs?
What is the positive value of x where a horizontal tangent occurs?
Transcribed Image Text:The graph of f(x) = 2x + 6x2 90x + 21 has two horizontal tangents. | What is the negative value of x where a horizontal tangent occurs? What is the positive value of x where a horizontal tangent occurs?
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