(x + 6) is a factor in x^2 - mx - 42

(x + 6) is a factor in x^2 - mx - 42. What is the value of m?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #46059