Question 36105
Again, why would you want to use the quadratic formula?? This one ALSO factors:

{{{f(x) = x^2 - 4}}}
{{{f(x) = (x-2)*(x+2)=0}}}
->-> {{{x= 2}}} or {{{x= -2}}}


Graphing looks like this:


{{{graph (300, 300, -4, 4, -6,6, x^2 -4)}}}

The roots are at x = -2 and x = 2


R^2 at SCC