Answer
Roots: $r=1\pm3i$
General solution: $y(x)=e^x(c_1 cos(3x)+c_2 sin(3x))$
Work Step by Step
Multivariable Calculus, 7th Edition
by Stewart, James
Published by
Brooks Cole
ISBN 10:
0-53849-787-4
ISBN 13:
978-0-53849-787-9
Chapter 17 - Second-Order Differential Equations - Review - Exercises - Page 1193: 2
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