## Elementary Algebra

The equation $x^{2}-4x-12=0$ can easily be solved by factoring as shown below: $x^{2}-4x-12=0$ $x^{2}+2x-6x-12=0$ $x(x+2)-6(x+2)=0$ $(x+2)(x-6)=0$ $x+2=0$ and $x-6=0$ $x=-2$ and $x=6$