Question

rút gọn biểu thức

A=\(\sqrt{27}\)-2\(\sqrt{12}\)-\(\sqrt{75}\)

Answer 1

Ta có: \(A=\sqrt{27}-2\sqrt{12}-\sqrt{75}\)

\(=3\sqrt{3}-2\cdot2\sqrt{3}-5\sqrt{3}\)

\(=-6\sqrt{3}\)

Answer 2

\(\Rightarrow A=3\sqrt{3}-2\cdot2\sqrt{3}-5\sqrt{3}=-4\sqrt{3}\)

Answer 3

⇔ A = \(3\sqrt{3}-4\sqrt{3}-5\sqrt{3}\)

⇔ \(A=-6\sqrt{3}\)