\(2\sqrt{18}-7\sqrt{2}+\sqrt{162}\)
\(=2.3\sqrt{2}-7\sqrt{2}+9\sqrt{2}\)
\(=6\sqrt{2}-7\sqrt{2}+9\sqrt{2}\)
\(=\left(6-7+9\right).\sqrt{2}\)
\(=8\sqrt{2}\)
Chúc bạn hok tốt!!!Vũ Quỳnh Nhung
ý bạn là \(2\sqrt{18-7\sqrt{2}+\sqrt{162}}\) hay \(2\sqrt{18}-7\sqrt{2}+\sqrt{162}\)