Question 474508
{{{x^2+x-4=0}}}
a=1
b=1
c=-4
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
{{{x = (-1 +- sqrt( 1-4*1*(-4) ))/(2*1) }}}
{{{x = (-1 +- sqrt( 1+16 ))/2 }}} 
{{{x = (-1 +- sqrt( 17 ))/2 }}} 
{{{ graph( 200, 200, -10, 10, -10, 10, x^2+x-4) }}}