Factorise the following polynomials using the Factor Theorem:
1. f(x) = x3 +3x2 − 6x − 8
2.p(x) = x3 − x2 − 4x + 4
3. f(x) = x3 + x2 − 5x + 3
4. p(x) = x3 +7x2 + 2x − 40
5. f(x) = 2x3 +11x2 + 18x + 9
6. Find the value of p if (x + 2) is a factor of x3 − 2x2 - px + 6
