Find the value of x if 9^x - 6*3^x - 27 = 0
3^x = y
y^2 - 6y - 27 = 0
(y-9)(y+3) = 0
y = 9, or -3.
However, y can't be negative since y = 3^x.
y = 9
3^x = 9
x = 2
=^._.^=
