Question

Giúp gấp cho em với ạ

Answer 1

1:\(=2\cdot7\sqrt{2}-\dfrac{2}{3}\cdot3\sqrt{2}=14\sqrt{2}-2\sqrt{2}=12\sqrt{2}\)

2: \(=10\left(2-\sqrt{3}\right)=20-10\sqrt{3}\)

3: \(=\sqrt{10}-3-\sqrt{10}=-3\)