solve the equation e

^{2x }-4e^{x}-5=0-
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solve the equation e^{2x }-4e^{x}-5=0

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Solve by factoring,

(e^{x }- 5)(e^{x} + 1) = 0

Since e^{x} > 0, the only solution is e^{x} - 5 = 0.

x = ln5 <==Answer