Answer
$-2,\pm i,1\pm\sqrt 3i$
Work Step by Step
$P(x)=x^3(x^2+1)+8(x^2+1)=(x^2+1)(x^3+8)=(x^2+1)(x+2)(x^2-2x+4)$
Zeros $-2,\pm i,1\pm\sqrt 3i$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 3 - Section 3.5 - Complex Zeros and the Fundamental Theorem of Algebra - 3.5 Exercises - Page 294: 58
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