$\"\"$

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The given funtion is $\"\"$

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Substitute $\"\"$ in given funtion.

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$\"\"$

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$\"\"$ (Cancel common terms)

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$\"\"$ (Add: $\"\"$ ) $\"\"$

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Substitute $\"\"$ in given funtion

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$\"\"$

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$\"\"$ (Zero product property: $\"\"$ ) $\"\"$

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Substitute $\"\"$ in given funtion.

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$\"\"$

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$\"\"$ (Multiply: $\"\"$ )

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$\"\"$ (Add: $\"\"$ ) $\"\"$

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The value of $\"\"$ .