Thanks. I understood that I have to rewrite this formula so I get the form of (1 + x)^-2
The problem is that I don't know how to perform the first step, I have difficulty with the algebra because of that power.
Thanks. I understood that I have to rewrite this formula so I get the form of (1 + x)^-2
The problem is that I don't know how to perform the first step, I have difficulty with the algebra because of that power.
The person who set this question has assumed basic skill in algebra.