Question

5a+1/3a=5 then 9a^2+1/25a^2=?​

Answer 1

Answer:

5a+ 1/3a = 5

or 5a/5 + 1/15a =1

or a+ 1/15a =1

or 3a+ 1/5a = 3

or { 3a+ 1/5a}^2 = 3^2

or 9a^2+ 1/25a^2+ 2*3*1/5 = 9

or 9a^2 +1/25a^2 = 9- 6/5

or 9a^2 + 1/25a^2 = 39/5 ANSWER