Mauricio Polanco

There's many ways of doing this one.  The most direct method, at least to me, is the following:  1 - (11/61)^2 = 1 - (121/3721) --> (1/1) - (121/3721) we multiply the denominators to get 3721. then...

1. Community
2. Study Group
3. Using the Pythagoreum Identity