Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 5 - Section 5.7 - Polynomial Equations and Their Applications - Exercise Set - Page 390: 39

Answer

$-5,5,1$

Work Step by Step

Given: $x^3-x^2=25x-25$ or, $x^3-x^2-25x+25=0$ or, $x^2(x-1)-25(x-1)=0$ Need to use factorization to solve the quadratic equation. This can be factorized as follows: $(x^2-25)(x-1)=0$ or, $(x-5)(x+5)(x-1)=0 $ Set each factor equal to zero, we get $x=-5,5,1$
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