Answer
$4x^2+5x-13$
Work Step by Step
The given expression, $
(3x^2-x-3)-(-x^2-6x+10)
,$ simplifies to
\begin{array}{l}\require{cancel}
3x^2-x-3+x^2+6x-10
\\\\=
(3x^2+x^2)+(-x+6x)+(-3-10)
\\\\=
4x^2+5x-13
.\end{array}
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 5 - Polynomials and Factoring - 5.1 Introduction to Factoring - 5.1 Exercise Set - Page 311: 69
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