SOLUTION: 3^x-14(3^-x)=5, help me please to find exact solution

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: 3^x-14(3^-x)=5, help me please to find exact solution      Log On


   

Question 933171: 3^x-14(3^-x)=5, help me please to find exact solution
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Multiply by 3^x
Then sub u for 3^x --> a quadratic in u.
Solve for u, sub back.