\"\"

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The inequality is \"\".

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Case:1                                                                  Case:2

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\"\"                                                                    \"\"

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\"\"                                                           \"\"

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(Subtract 5 from each side ).                         (Subtract 5 from each side ).

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\"\"                                           \"\"   

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\"\"                                                                \"\"

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\"\"

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Check:    To check the solution Substitute  r=7,-17 in the equation.

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\"\"                                                     \"\"

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\"\"                                                                 \"\"

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\"\"                                                 \"\"

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\"\"                                                             \"\"

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Hence proved