Question

Помогите!!!! Срочно!!!!! Решите подробно!!!!!!!

Answer 1

$(4\sqrt{3}-2\sqrt{5})\times\sqrt{3}+\sqrt{60}\\4\sqrt{3}\times\sqrt{3}-2\sqrt{5}\times\sqrt{3}+\sqrt{60}\\4\sqrt{3\times3}-2\sqrt{5\times3}+\sqrt{60}\\4\sqrt{9}-2\sqrt{15}+\sqrt{60}\\4\times3-2\sqrt{15}+\sqrt{4\times15}\\12-2\sqrt{15}+2\sqrt{15}\\12$