SOLUTION: factoring trinomals bu grouping 2r^2+19r+9

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Question 57341: factoring trinomals bu grouping
2r^2+19r+9
Answer by Nate(3500) About Me  (Show Source):
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2r^2 + 18r + r + 9
(2r^2 + 18r) + (r + 9)
2r(r + 9) + 1(r + 9)
(2r + 1)(r + 9)