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Solve the equation 2x^2 + 14x + 9=0...

Solve the equation `2x^2 + 14x + 9=0`

A

`frac(-7+sqrt31)(2)`

B

`frac(-7 - sqrt31)(2)`

C

`frac(-7+sqrt31)(2),frac(-7-sqrt31)(2)`

D

None of these

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