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## Homework Statement

integral of x^2/sqrt(9-25x^2)

## Homework Equations

## The Attempt at a Solution

dont know how to type theta so im using @

so i made x=3sin@

dx=3cos@d@

sqrt(9-25x^2)=sqrt(9-25(sin^2@))=sqrt(9-225(sin^2@)=sqrt(9(1-25(sin^2@))=sqrt(9(1-25(1-cos^2@))

not sure if im supposed to make sin^2 into cos^2 -1 or not and not sure were to go next