[√3+√3+√3]^2=3+√3+√3
2.27^2=5.1529
5.1529-3=2.1529
[√3+√3]^2=3+√3
2.1529^2=4.63497841
4.63497841-3=1.63497841
[√3]^2=3
1.63497841^2=2.6731544011661281
看见了吗?作为近似值,2.275比较接近（稍大一点）.