Question

Помогите решить срочно

Answer 1

$(\sqrt{6}-3)^2-(\sqrt{6}-2)(\sqrt{6}+2)+2\sqrt{54}=6-6\sqrt{6}+9-(\sqrt{6}-2)(\sqrt{6}+2)+6\sqrt{6}=6+9-(6-4)=6+9-2=13$