If a^4+b^4=23×a^2×b^2, show that log(a^2+b^2)=log 5+log a+log b.

Answer 1

the 2nd line says that a^2+b^2 = 5ab

a^4+b^4 = (a^2+b^2)^2 - (2ab)^2

That should help, but I cannot decipher the ~A character. Go for it.