Answer
$8x^2+4x+5$
Work Step by Step
$(5x^2+4x-2)+(3x^2+7)\longrightarrow$ use the associative property to reorder
=$(5x^2+3x^2)+4x+(7-2)\longrightarrow$ combine like terms
=$8x^2+4x+5$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 8 - Polynomials and Factoring - 8-2 Multiplying and Factoring - Mixed Review - Page 484: 49
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