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I need to solve using the quadratic formula 2r^2+6r-15=0. PLEASE HELP!!! And I would like work shown so I could see how you get the answer. Thanks!

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kadenli223

2r^2+6r-15=0

cannot be factored so use quadratic formula

(-6+- √156)/4     Plug in a use a calculator

(-3±√39)/2      simplify the radical and rationalize the fraction

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