72-74 - Real and Non-Real Coefficients So far, we have worked only with polynomials that have real coefficients. These exercises involve polynomials with real and imaginary coefficients. 72. Find all solutions of the equation. (b) x² – ix = 0 (d) ix – 2x + i= 0 (a) 2x + 4i = 1 (c) x + 2ix -1 = 0 73. (a) Show that 2i and 1 - i are both solutions of the equation * - (1 + i)x + (2 + 2i) = 0 but that their complex conjugates - 2i and 1 + i are not. (b) Explain why the result of part (a) does not violate the Conjugate Zeros Theorem. 74. (a) Find the polynomial with real coefficients of the smallest possible degree for which i and 1 + i are zeros and in which the coefficient of the highest power is 1. (b) Find the polynomial with complex coefficients of the smallest possible degree for which i and 1 + i are zeros and in which the coefficient of the highest power is 1.

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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72–74 ■ Real and Non-Real Coefficients So far, we have
worked only with polynomials that have real coefficients. These
exercises involve polynomials with real and imaginary
coefficients

72-74 - Real and Non-Real Coefficients So far, we have
worked only with polynomials that have real coefficients. These
exercises involve polynomials with real and imaginary
coefficients.
72. Find all solutions of the equation.
(b) x² – ix = 0
(d) ix – 2x + i= 0
(a) 2x + 4i = 1
(c) x + 2ix -1 = 0
73. (a) Show that 2i and 1 - i are both solutions of the equation
* - (1 + i)x + (2 + 2i) = 0
but that their complex conjugates - 2i and 1 + i are not.
(b) Explain why the result of part (a) does not violate the
Conjugate Zeros Theorem.
74. (a) Find the polynomial with real coefficients of the smallest
possible degree for which i and 1 + i are zeros and in
which the coefficient of the highest power is 1.
(b) Find the polynomial with complex coefficients of the
smallest possible degree for which i and 1 + i are zeros
and in which the coefficient of the highest power is 1.
Transcribed Image Text:72-74 - Real and Non-Real Coefficients So far, we have worked only with polynomials that have real coefficients. These exercises involve polynomials with real and imaginary coefficients. 72. Find all solutions of the equation. (b) x² – ix = 0 (d) ix – 2x + i= 0 (a) 2x + 4i = 1 (c) x + 2ix -1 = 0 73. (a) Show that 2i and 1 - i are both solutions of the equation * - (1 + i)x + (2 + 2i) = 0 but that their complex conjugates - 2i and 1 + i are not. (b) Explain why the result of part (a) does not violate the Conjugate Zeros Theorem. 74. (a) Find the polynomial with real coefficients of the smallest possible degree for which i and 1 + i are zeros and in which the coefficient of the highest power is 1. (b) Find the polynomial with complex coefficients of the smallest possible degree for which i and 1 + i are zeros and in which the coefficient of the highest power is 1.
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