Answer
$7x^2-4x+2$
Work Step by Step
$(5x^2-6)+(2x^2-4x+8)$
Group like terms
$=5x^2+2x^2-4x-6+8$
Combine like terms
$=7x^2-4x+2$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Appendix A - Exercise Set - Page 975: 26
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