Sunday

September 21, 2014

September 21, 2014

Posted by **Roger** on Monday, January 7, 2013 at 10:56pm.

e^x-4=-e^-x

please show work

- math -
**Steve**, Tuesday, January 8, 2013 at 12:26amif you let u = e^x,

u-4 = -1/u

u^2 - 4u = -1

u^2 - 4u + 1 = 0

now just use the quadratic formula and if yuo get values for u, wind up with

x = ln(u) if defined

**Answer this Question**

**Related Questions**

Math - Exponential equation - Solve the exponential equation. Express your ...

precalculus - solve the following exponential equation. show all work. 4^(4x+2...

Math - 2 - Solve the exponential equation. Express your solutions in exact form ...

pre calculus - Solve the exponential equation Express you solutions in exact ...

college algebra - Solve the exponential equation. Express your solutions in ...

Calculus - Solve the exponential equation for t. Round your answer to three ...

math - 2. Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3 3...

math - solve the following exponential equation e^x-4=-e^-x when I work i get x-...

math - solve the following exponential equation:show your work. e^x-e^-x/2=7 1. ...

Math - Logarithm - Solve the following equation. Please show all of your work. 5...