$\"\"$

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The integral is $\"\"$ .

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To complete the square add and subtract $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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Find the integral by trigonometric substitution.

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Let $\"\"$ , therefore $\"\"$ .

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$\"\"$

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Observe the figure:

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$\"\"$

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$\"\"$ .

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Substitute corresponding values in $\"\"$ .

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$\"\"$

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Substiute $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$ is constant.

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$ .