Question

X^- x - 6 and x^ -5x +6 what are thier common factors

Answer 1

I guess you mean:

X^2 - X - 6   and X^2 - 5X + 6

X^2 - X - 6 = (X + 2)(X − 3)

X^2 - 5X + 6 = (X − 2)(X − 3)

Based on that, their common factor is:

(X - 3)