Step 1:

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The function is $\"\"$ .

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Find the values of $\"\"$ for $\"\"$ .

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Consider $\"\"$ .

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$\"\"$

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Step 2:

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Case I)

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If both the factors are positive.

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$\"\"$

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The statement is true for $\"\"$ .

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Case II)

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If both the factors are negative.

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$\"\"$

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The statement is true for $\"\"$ .

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$\"\"$ for all values of $\"\"$ and $\"\"$ .

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Solution:

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$\"\"$ for all values of $\"\"$ and $\"\"$ .