If (x/y)=(7/5), find the value (x^2+y^2)/(x^2-y^2)	Choose the correct choice from the following answers.
A) 37/12  B) 59/11  C) 51/77  D) 41/11  E) None of them
= (x^2+y^2)/(x^2-y^2) = ( x^2 /y^2+ 1)/ ( x^2 /y^2-1) = [(7/5)^2+1] / [(7/5)^2-1]   = [(49/25)+1] / [(49/25)-1] = 37/12   37/12nswer is 37/12.
<result>A</result>
If (x/y)=(7/5), find the value (x^2+y^2)/(x^2-y^2)