(8+2x)(3x+8)=330
6x? +40x+64-330=0
6x? +40x-266=0
3x? +20x- 133=0
x=[-20 √(20? +3*4* 133)]/2*3
=(-20 √ 1996)/6
=(-20 45)/6
x≈4. 1
(8+2x+x+8+x/2)*2+8*3
=7x+32+24
=7*4. 1+32+24
=28.7+32+24
=84.7>75
Therefore, a 75-meter rope cannot enclose this farm.
If there is no rope around the place that can be recessed, it can be directly surrounded.