Объяснение:

1) (х+2)²/х+2=х+2

2)(3а-1)²/3а-1=3а-1

3)2b³с/3а²

4)4pq(p-q)/2p²(p-q)(p+q)=4pq/2p²(p+q)

5)(a-8)(a+8)/a+8=a-8

6)(11-x)(11+x)/x-11= -(x-11)(11+x)/x-11= -(11+x)