The answer is (x + 5)
Rewrite –x as a Difference
x² + 5x - 6x - 30
Factor out x from the expression in x² + 5x - 6x - 30
x(x + 5) - 6x - 30
Factor out –6 from the expression in x(x + 5) - 6x - 30
x(x + 5) – 6(x + 5)
Factor out (x + 5) from the expression
→ (x + 5) (x - 6)