Answer
(a) $\frac{1-4i}{2}$
(b) $0,i$
(c) $-i$
(d) $-i\pm2\sqrt 2i$
Work Step by Step
(a) $x=\frac{1-4i}{2}$
(b) $x(x-i)=0, x=0,i$
(c) $x=\frac{-2i\pm\sqrt {-4+4}}{2}=-i$
(d) $x^2+2ix+1=0,x=\frac{-2i\pm\sqrt {-4-4}}{2}=-i\pm2\sqrt 2i$
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: 72
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