2. The completely factored form of n - 9n² +4n³-36m - 12m² + 108 is
1) (n²-9)(n+6) (2-2)
2) (n+3)(n-3)(x + 6) (2-2)
3) (n-3)(n-3)(n+ 6) (n − 2)
4) (+3)(n-3) (z - 6) (x + 2)