Answer
$-x^2+2x+3$
Work Step by Step
Using the given functions, then,
\begin{array}{l}
2\cdot P(x)+Q(x)
\\=
2(2x-1)-(x^2+2x-5)
\\=
4x-2-x^2-2x+5
\\=
-x^2+2x+3
.\end{array}
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Review - Page 330: 58
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