Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 5 Polynomials and Polynomial Functions - 5.7 Apply the Fundamental Theorem of Algebra - 5.7 Exercises - Skill Practice - Page 384: 26



Work Step by Step

We need to write down the polynomial $f(x)$ in factored form. $f(x)=(x+1)(x-2)(x-3i)(x+3i)$ $=(x^2+x-2x-2)(x^2+9)$ $=x^4+9x^2-x^3-9x-2x^2-18$ $=x^4-x^3+7x^2-9x-18$
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