1 nhân chia căn bậc hai

a/\(\left(\dfrac{4}{3}\sqrt{3}+\sqrt{2}+\sqrt{3\dfrac{1}{3}}\right)\left(\sqrt{1,2}+\sqrt{2}-4\sqrt{0,2}\right)\)

b/ \(\left(\dfrac{3x}{2}\sqrt{\dfrac{x}{2y}}-0,4\sqrt{\dfrac{2}{xy}}+\dfrac{1}{3}\sqrt{\dfrac{xy}{2}}\right):\dfrac{4}{15}\sqrt{\dfrac{2x}{3y}}\)

2 Cộng trừ căn bậc hai

a/ \(0,1\sqrt{200}-2\sqrt{0,08}+4\sqrt{0,5}+0,4\sqrt{50}\)

b/ \(\dfrac{2}{3}x\sqrt{9x}+6x\sqrt{\dfrac{x}{4}-x^2}\sqrt{\dfrac{1}{x}}\)