(2-e^x)^2=(e^x-3)^2 | Subst. u = e^x
(2-u)^2 = (u-3)^2 | √
2-u = ± (u-3)
Fall mit +
2-u = u - 3
5 = 2u
2.5 = u
Rücksubstitution:
2.5 = e^x
ln(2.5) = x
Fall mit -
2-u = -( u - 3)
2-u = -u+ 3
-1 = 0u
-1 = 0 Widerspruch. ==>Es gibt keine weitere Lösung.