(1-2根号3)(1+2根号3)-(1+根号3)的平方=1-12-(1+3+2倍根号3)=1-12-4-2倍根号3=-15-2倍根号3若有帮助请采纳O(∩_∩)O谢谢
(1-2根号3)(1+2根号3)-(1+根号3)的平方=1-(2根号3)^2-(1+2根号3+3)=1-12-4-2根号3=-15-2根号3 不懂可追问,有帮助请采纳,谢谢!