Factor each trinomial: x^2-7x+6 , x^2+9x+18 , x^2-4x-32 , x^2+10x-24

1. x^2 - 7x + 6

(x - 6)(x - 1)

2. x^2 + 9x + 18
(x + 6)(x + 3)

3. x^2 - 4x - 32
(x - 8)(x + 4)

4. x^2 + 10x - 24
(x + 12)(x - 2)