Tính 

A=\(\left(2\sqrt{6}-4\sqrt{3}+5\sqrt{2}-\dfrac{1}{4}\sqrt{8}\right)3\sqrt{6}\)

Tính

A=\(\left(12\sqrt{50}-8\sqrt{200}+7\sqrt{450}\right):\sqrt{10}\)

Giai ptr

a,\(\sqrt{3x+1}+3x=1\)

b,\(\dfrac{\sqrt{5x+7}}{\sqrt{x+3}}=7\)

Giai ptr 

a,\(3\sqrt{12x}-2\sqrt{27x}+4\sqrt{3x}=8\)

b,\(\sqrt{4x-20}+\sqrt{x+5}-\dfrac{1}{3}\sqrt{9x-45}=4\)

c,\(\sqrt{4x-8}-2\sqrt{9x-18}-\dfrac{3}{4}\sqrt{16x-32}=3\)

Tính

A=\(\dfrac{3\sqrt{8}-2\sqrt{12}+\sqrt{20}}{3\sqrt{18}-2\sqrt{27}+\sqrt{45}}\)

B=\(\dfrac{\sqrt{2}+\sqrt{3}+\sqrt{6}+\sqrt{8}+4}{\sqrt{2}+\sqrt{3}+\sqrt{4}}\)

C=\(\sqrt{3-\sqrt{5}}\left(3+\sqrt{5}\right)\left(\sqrt{10}-\sqrt{2}\right)\)