#### Answer

-3, 6

#### Work Step by Step

Solving by setting the factors equal to zero, we find:
$$2\left(r^2-3r-18\right)\\ 2\left(r+3\right)\left(r-6\right) \\ r=-3, 6$$

Published by
Wiley

ISBN 10:
1118583191

ISBN 13:
978-1-11858-319-7

-3, 6

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