\(2\sqrt{9}-\sqrt{12}+3\sqrt{3}=6-2\sqrt{3}+3\sqrt{3}=6+\sqrt{3}\)
rút gọn biểu thức sau:2√9-√12+3√3
Giải:
2√9-√12+3√3
=> \(2\sqrt{3^2}-\sqrt{12}+3\sqrt{3}\)
=> 2.3- \(3.\sqrt{4}\) + \(3\sqrt{3}\)
=> 6- \(3.\sqrt{2^2}\) + \(3\sqrt{3}\)
=> 6 - 3.3+ \(3\sqrt{3}\)
=> 6-3.(\(3+\sqrt{3}\))
=> 6-9+ \(3\sqrt{3}\)