Question 220511
e^{2x} + 4e^{x} = +12
e^{2x} + 4e^{x} - 12 = 0
It's a quadratic in e^x
(e^x + 6)*(e^x - 2) = 0
e^x = -6 --> x = ln(-6) NG, ignore
e^x = 2 --> x = ln(2)
x =~ 0.69314