Question 630039
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
x^2+8x=12
x^2 + 8x -12 = 0
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
{{{x = (-8 +- sqrt( 64-4*1*(-12) ))/2 }}}
 {{{x = (-8 +- sqrt( 112) )/2 }}} 
 {{{x = (-8 +- sqrt( 16*7) )/2 }}}
  {{{x = (-8 +- 4sqrt(7) )/2 }}} 
  {{{x = -4 +- 2sqrt(7) }}} 
use Your calculator if decimal form is requested