Answer:
1. (3n+2)(n+3)
3n²+9n+2n+6
=3n²+11n+6
2.(n-1)(2n-2)
2n²-2n-2n-2
=2n²-4n+2
3. (2x+3)(2x-3)
4x²-6x+6x-9
=4x²-9
4. (r+1)(r-3)
r²-3r+r-3
=r²-2r-3
5. (2n+3)(2n+1)
4n²+2n+6n+3
= 4n²+8n+3
6. (3p-3)(p-1)
3p²-3p-3p+3
=3p²+3
