Answer:
1.2n*3+8n*2-32n+16
2.x*2+3x+9
=(x*3-27)/(x-3)
=x*3-27
_______ over
x*3
=(x-3)(x*2+x×3+3*2)
_______________over
x-3
=x*2+x×3+3*2
=x*2+3x+3*2
X*2+3X+9
