Answer
$7a^2-10a+1$
Work Step by Step
Group all the like terms together before adding.
$(5a^2-7a+5)+(2a^2-3a-4)$
$=(5a^2+2a^2-7a-3a+5-4)$
$=7a^2-10a+1$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 5 - Section 5.3 - Addition and Subtraction of Polynomials - Exercise - Page 221: 21
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