To factor the quadratic expression \(x^{2} + x - 12\), we need to find two numbers that multiply to \(-12\) (the constant term) and add to \(1\) (the coefficient of \(x\)).
The numbers that fit these criteria are \(4\) and \(-3\), since:
- \(4 \times (-3) = -12\)
- \(4 + (-3) = 1\)
Therefore, we can express \(x^{2} + x - 12\) as:
\[ (x + 4)(x - 3) \]
So the factored form of the expression is \((x + 4)(x - 3)\).