Answer
d. 2(5$x^{2}$ - x - 1)
Work Step by Step
When we multiply out each option, we find that d is correct:
2(5$x^{2}$) = 10$x^{2}$
2(-x) = -2x
2(-1) = -2
2(5$x^{2}$ - x - 1) = 10$x^{2}$ - 2x - 2
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Section 5.5 - The Greatest Common Factor and Factoring by Grouping - Exercise Set - Page 295: 81
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