Question 473243
{{{e^(-1)=x^2}}}

{{{x^2=1/e}}}


{{{x=sqrt(1/e)}}}


{{{x=1/sqrt(e)}}}

solutions:

{{{x=1/sqrt(e)}}}

or

{{{x=-1/sqrt(e)}}}

{{{e= 2.718281828459045}}}

{{{x=1/sqrt(2.718281828459045)=1/1.6487212707001280754720355727369=0.6}}}

or

{{{x=-0.6}}}