What is the integral of 1/((8-2x-x^2)^{3/2)} ?

The integral of 1/((8-2x-x^2)^{3/2)} is (x+1)/(9(-x^2-2x+8)^{1/2)}+C

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integral of 1/((8-2x-x^2)^{3/2)}

\int \frac{1}{( 8 - 2 x - x ^{2} ) ^{\frac{3}{2}}} d x

\frac{x + 1}{9 ( - x ^{2} - 2 x + 8 ) ^{\frac{1}{2}}} + C

Solution steps

\int \frac{1}{( 8 - 2 x - x ^{2} ) ^{\frac{3}{2}}} d x

Complete the square

8 - 2 x - x^{2} : - (x + 1)^{2} + 9

= \int \frac{1}{( - ( x + 1 ) ^{2} + 9 ) ^{\frac{3}{2}}} d x

Apply u-substitution

: \int \frac{1}{( - u ^{2} + 9 ) ^{\frac{3}{2}}} d u

= \int \frac{1}{( - u ^{2} + 9 ) ^{\frac{3}{2}}} d u

Apply Trigonometric Substitution

: \int \frac{1}{9 cos ^{2} ( v )} d v

= \int \frac{1}{9 cos ^{2} ( v )} d v

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= \frac{1}{9} \cdot \int \frac{1}{cos ^{2} ( v )} d v

Use the common integral:

\int \frac{1}{cos ^{2} ( v )} d v = tan (v)

= \frac{1}{9} tan (v)

Substitute back

= \frac{1}{9} tan (arcsin (\frac{1}{3} (x + 1)))

Simplify

\frac{1}{9} tan (arcsin (\frac{1}{3} (x + 1))) : \frac{x + 1}{9 ( - x ^{2} - 2 x + 8 ) ^{\frac{1}{2}}}

= \frac{x + 1}{9 ( - x ^{2} - 2 x + 8 ) ^{\frac{1}{2}}}

Add a constant to the solution

= \frac{x + 1}{9 ( - x ^{2} - 2 x + 8 ) ^{\frac{1}{2}}} + C

n = 0 \sum \infty \frac{2 ^{n}}{4 ^{n}}

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What is the integral of 1/((8-2x-x^2)^{3/2)} ?
The integral of 1/((8-2x-x^2)^{3/2)} is (x+1)/(9(-x^2-2x+8)^{1/2)}+C