Factor \({x}^{2}-3x-18\).
Ask: Which two numbers add up to \(-3\) and multiply to \(-18\)?
Rewrite the expression using the above.
\[(x-6)(x+3)\]
Solve for \(x\).
Ask: When will \((x-6)(x+3)\) equal zero?
When \(x-6=0\) or \(x+3=0\)
Solve each of the 2 equations above.
\[x=6,-3\]
