$\"\"$

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(a)

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The rational function is $\"\"$ .

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Observe the graph of the function :

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The x - intercept is $\"\"$ .

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$\"\"$

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(b)

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Equate $\"\"$ to zero.

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

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$\"\"$

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$\"\"$

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$\"\"$ .

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The value of $\"\"$ .

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Both results of (a) and (b) is same.

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$\"\"$

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(a)

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The x - intercept is $\"\"$ .

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(b) The value of $\"\"$ .