Question: How to question

Hello,

     I just purchased Maple and I am just learning calculus pretty much for fun.  I am reading "Calculus Made Easy" by Sylvanus Thompson.  On page 56 there is a set of equations for which I would like to know the steps.  I was wondering how to do this in Maple.  I played around with the Student and Tutor commands, but can't seem to get it to work.

     The equation is y+dy=(x+dx)^-2

                                   =x^-2(1+dx/x)^-2

I would like to know the steps to get from the second part of the equation to the third part.  I realize it has to do with the binomial equation, but would like to see it done for me and also figure out how to get the steps listed in Maple. 

     I'm pretty "green", so my apologies ahead of time if this is a simple question.

cstandley