Answer:
3(x -1) / (x + 1)(x + 2).
Step-by-step explanation:
(x-1)/(x^2-2x-3)].[(3x-9)/(x+2)
Factoring the denominator and 3x - 9:
= (x - 1) / (x + 1)(x - 3) * 3(x - 3) / (x + 2)
The (x - 3)'s cancel out, so we have:
(x - 1)/(x + 1) * 3 / (x + 2)
= 3(x -1) / (x + 1)(x + 2).
