$\"\"$

\

The fraction is $\"\"$ .

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Rewrite the fraction.

\

$\"\"$

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Rewrite the fraction as partial fraction decomposition.

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$\"\"$

\

$\"\"$

\

$\"\"$

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$\"\"$ .

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Equate $\"\"$ coefficients.

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$\"\"$

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Equate constants.

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$\"\"$

\

$\"\"$

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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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Substitute $\"\"$ and $\"\"$ in equation $\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$ .