Question 125266
{{{f(x)=x2-4}}}
 {{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
 {{{x = (-0 +- sqrt( 0^2-4*1*(-4) ))/(2*1) }}}
 {{{x = (0 +- sqrt( 16 ))/(2) }}}
 {{{x = (0 +- 4)/(2) }}}
{{{x = (0 +- 2) }}}
{{{highlight(x[1]=-2)}}} 
{{{highlight(x[2]=2)}}}
{{{ graph( 300, 300, -5, 5, -5, 5, x^2-4) }}}

{{{g(x)=x^2-x-12}}}
 {{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
 {{{x = (-(-1) +- sqrt( 1^2-4*1*(-12) ))/(2*1) }}}
 {{{x = (1 +- sqrt( 1+48 ))/(2) }}}
{{{x = (1 +- sqrt( 49 ))/(2) }}}
{{{x = (1 +- 7)/(2) }}}
 {{{x[1] = (1 + 7)/(2) }}}
{{{x[1]=8/2}}}
{{{highlight(x[1]=4)}}}
{{{x[2] = (1 -7)/(2) }}}
{{{x[2]=-6/2}}}
{{{highlight(x[2]=-3)}}}
{{{ graph( 300, 300, -10, 10, -20,20,x^2-x-12) }}}