Question 728605
{{{x^2-4 = 0}}}....factor it completely

{{{(x -2)(x+2) = 0}}}

solutions:

if {{{x-2 = 0}}}..=>...{{{x =2}}}

if {{{x+2 = 0}}}..=>...{{{x=-2}}}


{{{ graph( 600, 600, -5, 5, -5, 5, x^2-4) }}}