Answer
$$8x^2+3x+4.5$$
Work Step by Step
We have $$(3x^2+4x-1.2)+(5x^2-x+5.7)$$
Adding $$8x^2+3x+4.5$$
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 332: 145
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