Question 618422
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
{{{x^2-4x-6=0}}}
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
 {{{x = (4 +- sqrt( 40 ))/(2) }}}
 {{{x = (4 +- 2sqrt( 10 ))/(2) }}}
 {{{x = 2 +- sqrt( 10) }}}