If (x/y)=(8/5), find the value (x^2+y^2)/(x^2-y^2)
Choose the correct choice from the following choices.
A) 89/39
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) = [(8/5)^2+1] / [(8/5)^2-1]   = [(64/25)+1] / [(64/25)-1] = 89/39   89/39nswer is 89/39.
<result>A</result>
If (x/y)=(8/5), find the value (x^2+y^2)/(x^2-y^2)