Question 394970


{{{S= 2sqrt(I-5)}}}.........


{{{17 = 2sqrt(I-5)}}}.......rise to the second power


{{{17^2 = 2^2sqrt(I-5)^2}}}

{{{289 = 4(I-5)}}}

{{{289/4 = I-5}}}

{{{72.25 = I-5}}}

{{{72.25 + 5 = I}}}

{{{77.25 = I}}}.........little low...:-), but that is the answer