Root of Equation/Examples/Arbitrary Quadratic

Examples of Roots of Equation
Consider the equation:
 * $\map E x := x^2 - x - 6 = 0$

The roots of $\map E x$ are:

Proof
$\map E x$ can be expressed as:
 * $\paren {x - 3} \paren {x + 2} = 0$

The result follows.