$\"\"$

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The function is $\"\"$ .

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Replace $\"\"$ with y.

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$\"\"$

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Next switch x for y and y for x.

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$\"\"$

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$\"\"$

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$\"\"$

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Next solve for y:

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$\"\"$

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$\"\"$ (Multiply each side by negative one)

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$\"\"$ (Product of two same signs is positive)

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$\"\"$ (Product of two different signs is negative) $\"\"$

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$\"\"$ (Divide each side by 4)

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$\"\"$ (Cancel common terms)

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The value of $\"\"$ . $\"\"$

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Write in function notation,using $\"\"$ to represent the inverse of the function f.

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$\"\"$

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"y " value substitute in above function,

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$\"\"$ . $\"\"$

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The inverse function of $\"\"$ is $\"\"$ .