What is the integral of 1/((5+2x+x^2)^{3/2)} ?

The integral of 1/((5+2x+x^2)^{3/2)} is (x+1)/(4(x^2+2x+5)^{1/2)}+C

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integral of 1/((5+2x+x^2)^{3/2)}

integral

\frac{1}{( 5 + 2 x + x ^{2} ) ^{\frac{3}{2}}}

\frac{x + 1}{4 ( x ^{2} + 2 x + 5 ) ^{\frac{1}{2}}} + C

Solution steps

\int \frac{1}{( 5 + 2 x + x ^{2} ) ^{\frac{3}{2}}} d x

Complete the square

5 + 2 x + x^{2} : (x + 1)^{2} + 4

= \int \frac{1}{( ( x + 1 ) ^{2} + 4 ) ^{\frac{3}{2}}} d x

Apply u-substitution

= \int \frac{1}{( u ^{2} + 4 ) ^{\frac{3}{2}}} d u

Apply Trigonometric Substitution

= \int \frac{1}{4 sec ( v )} d v

Take the constant out:

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

= \frac{1}{4} \cdot \int \frac{1}{sec ( v )} d v

Rewrite using trig identities

= \frac{1}{4} \cdot \int cos (v) d v

Use the common integral:

\int cos (v) d v = sin (v)

= \frac{1}{4} sin (v)

Substitute back

= \frac{1}{4} sin (arctan (\frac{1}{2} (x + 1)))

Simplify

\frac{1}{4} sin (arctan (\frac{1}{2} (x + 1))) : \frac{x + 1}{4 ( x ^{2} + 2 x + 5 ) ^{\frac{1}{2}}}

= \frac{x + 1}{4 ( x ^{2} + 2 x + 5 ) ^{\frac{1}{2}}}

Add a constant to the solution

= \frac{x + 1}{4 ( x ^{2} + 2 x + 5 ) ^{\frac{1}{2}}} + C

in t e g r a l cos (x) - 1

in t e g r a l \frac{( x - 2 )}{( 2 x ^{2} - 8 x - 1 )}

in t e g r a l \frac{x}{x - 6}

in t e g r a l (1 + x) cos (1 + x)

in t e g r a l \frac{( - e ^{- 2 x} )}{2}

What is the integral of 1/((5+2x+x^2)^{3/2)} ?
The integral of 1/((5+2x+x^2)^{3/2)} is (x+1)/(4(x^2+2x+5)^{1/2)}+C