Question 811931
{{{log(3(x^2+1))}}} = 4
The exponent equiv of logs
(x^2+1) = {{{3^4}}}
x^2 + 1 = 81
x^2 = 81 - 1
x^2 = 80
x = {{{sqrt(82)}}}
x = {{{sqrt(16*5)}}}
x = {{{4sqrt(5)}}}