2
$\begingroup$

When solving

$\ln(x^2+1) = \ln(x) + 2$

I'm getting stuck at

$e^2 = \dfrac{x^2+1}{x}$

How do I isolate $x$?

  • 1
    Write as a quadratic equation and solve for $x$.2012-05-27

1 Answers 1

7

$e^2=\frac{x^2+1}{x}\Longleftrightarrow x^2-e^2x+1=0$

and you have a simple quadratic to solve.

  • 0
    Don't worry, I do know about how to solve quadratic equations. ;-)2012-05-27