- #1

qw3x

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## Homework Statement

[itex]\int \frac{dx}{x^2-a^2}[/itex]

## Homework Equations

## The Attempt at a Solution

I've reached the answer, [itex]\frac{1}{2a} ln |\frac{x-a}{x+a}| + C[/itex] , using partial fractions, but my professor asks for the work using substitution. Now I know how to do this when there's a radical in the denominator, but would this also be a substitution [itex]x=asec(\theta)[/itex]?