$\"\"$

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The integral is $\"\"$ .

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Let $\"\"$ , then $\"\"$ .

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$\"\"$ .

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Boundaries :

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if $\"\"$ , then $\"\"$ .

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if $\"\"$ , then $\"\"$ .

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Substitute corresponding values in $\"\"$ .

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$\"\"$

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$\"\"$

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Apply integration rule : $\"\"$ .

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$\"\"$

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Apply integration rule : $\"\"$ .

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$\"\"$

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$\"\"$ . $\"\"$

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Draw a coordinate plane.

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Graph the integrand, i.e, $\"\"$ .

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Graph :

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$\"\"$

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Observe the graph:

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The integral $\"\"$ is equal to $\"\"$ . $\"\"$

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$\"\"$ .