$\"\"$

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The partial fraction of rational expression is $\"\"$ .

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Multiple each side by the denominator fraction.

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$\"\"$

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$ .

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Equate the coefficient of $\"\"$ , $\"\"$ and constants.

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$\"\"$ , $\"\"$ , $\"\"$ and $\"\"$

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$\"\"$ , $\"\"$ , $\"\"$ and $\"\"$ .

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$ .

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$ .

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Therefore $\"\"$ , $\"\"$ , $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$ , $\"\"$ , $\"\"$ and $\"\"$ .