Answer
See graph, $4.50$
Work Step by Step
See graph for $y=x^4-1.4x^3-33.71x^2+23.94x+292.41$ and we can identify the positive x-intercept as $x\approx4.50$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Appendix B - Graphing Utilities - B.3 Using a Graphing Utility to Locate Intercepts and Check for Symmetry - B.3 Assess Your Understanding - Page B6: 9
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