Factor \({x}^{2}-3x-4\).
Ask: Which two numbers add up to \(-3\) and multiply to \(-4\)?
Rewrite the expression using the above.
\[(x-4)(x+1)\]
Solve for \(x\).
Ask: When will \((x-4)(x+1)\) equal zero?
When \(x-4=0\) or \(x+1=0\)
Solve each of the 2 equations above.
\[x=4,-1\]
