$\"\"$

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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 b from each side ). (Subtract b from each side ).

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$\"\"$ $\"\"$

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$\"\"$

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$\"\"$ $\"\"$

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(Add 9 to each side) (Subtract 9 to each side )

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$\"\"$ $\"\"$

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$\"\"$ $\"\"$

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(Divide each side by negative 3)

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$\"\"$

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$\"\"$

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The solutions are 14 and 4/3 $\"\"$

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Check: To check the solution Substitute $\"\"$ in the equation.

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$\"\"$ $\"\"$

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$\"\"$ $\"\"$

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$\"\"$ $\"\"$

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$\"\"$ $\"\"$

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$\"\"$ $\"\"$

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Hence proved.