An attenuator is designed to conform to the condition that,

eqn 1: (R1 + R2 + Ro) /R2 = 5

where Ro = sqrt(R1R2 +( R1^2) /4) = 60

find value of R1 and R2 (note in practice no negative resistance)

I am working through some of my very old books and have got stuck on procedure to break this code. I have the answers but need a nudge on how to go about this one. Any help is much appreciated so i can stop having sleepless nights and mathematical nightmares.

Thanks for you help