Question 560418
this is a quadratic in e^x ___ (e^x)^2 - 2(e^x) - 15 = 0


factoring ___ [(e^x) - 5][(e^x) + 3] = 0


e^x - 5 = 0 ___ e^x = 5 ___ x = Ln(5)


e^x + 3 = 0 ___ e^x = -3 ___ logarithms (natural or otherwise) are not defined for negative arguments