`e^(2x) - 4e^x - 5 = 0` Solve the exponential equation algebraically. Approximate the result to three decimal places.

Textbook Question

Chapter 3, 3.4 - Problem 39 - Precalculus (3rd Edition, Ron Larson).
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balajia | College Teacher | (Level 1) eNoter

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Put `e^x=t.`





`t=5 or t=-1`

`e^x = 5 and e^xgt0`

Take ln on both sides, we get 



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