The factored form of the expression $x^2 - 5x - 6$ is $(x - 6)(x + 1)$.

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Here are five related questions you might find interesting:

1. How can you determine the roots of the quadratic equation $x^2 - 5x - 6 = 0$?
2. What are the techniques to factor more complex quadratic expressions?
3. How can you check if the factorization of a quadratic expression is correct?
4. What is the importance of factoring in solving quadratic equations?
5. How do you factor quadratic expressions when the leading coefficient is not 1?

Tip: Always double-check your factorization by expanding the factors to ensure they match the original expression.