College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 3, Polynomial and Rational Functions - Section 3.3 - Dividing Polynomials - 3.3 Exercises - Page 310: 14

Answer

$27x^{5}-9x^{4}+3x^{2}-3=$ $=(3x^{2}-3x+1)(9x^{3}+6x^{2}+3x+2)+(3x-5)$

Work Step by Step

$\left[\begin{array}{l} \\\\ 3x^{2}-3x+1\ )\\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \end{array}\right. \left.\begin{array}{llllll} 9x^{3} & +6x^{2} & +3x & +2 & & \\ \hline 27x^{5} & -9x^{4} & & +3x^{2} & & -3\\ 27x^{5} & -27x^{4} & 9x^{3} & & & \\ -- & -- & -- & & & \\ & 18x^{4} & -9x^{3} & +3x^{2} & & -3\\ & 18x^{4} & -18x^{3} & +6x^{2} & & \\ & -- & -- & -- & & \\ & & 9x^{3} & -3x^{2} & & -3\\ & & 9x^{3} & -9x^{2} & 3x & \\ & & -- & -- & -- & \\ & & & 6x^{2} & -3x & -3\\ & & & 6x^{2} & -6x & +2\\ & & & -- & -- & --\\ & & & & 3x & -5 \end{array}\right]$ $Q(x)=9x^{3}+6x^{2}+3x+2,\quad R(x)=3x-5$ In the form $P(x)=D(x)\cdot Q(x)+R(x),$ $27x^{5}-9x^{4}+3x^{2}-3=$ $=(3x^{2}-3x+1)(9x^{3}+6x^{2}+3x+2)+(3x-5)$
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