\(\sqrt{8+\sqrt{60}}+\sqrt{45}-\sqrt{12}\)
\(=\sqrt{\left(\sqrt{3}+\sqrt{5}\right)^2}+3\sqrt{5}-2\sqrt{3}\)
\(=\left|\sqrt{3}+\sqrt{5}\right|+3\sqrt{5}-2\sqrt{3}\)
\(=\sqrt{3}+\sqrt{5}+3\sqrt{5}-2\sqrt{3}\)
\(=4\sqrt{5}-\sqrt{3}\)
(Nhớ click cho mình với nhá!)