\(A=\sqrt{80}+\sqrt{45}+\sqrt{5}\)
\(B=\frac{5}{\sqrt{10}}+3,5.\sqrt{40}\)
\(C=\frac{1}{\sqrt{3}-2}+\frac{\sqrt{300}}{10}-\sqrt{12}\)
\(D=4\sqrt{x}+2\sqrt{x^2}-\sqrt{16x}\)( x > hoặc = 0 )
\(E=\sqrt{25x+25}-\sqrt{9x+9}+\sqrt{4x+x}vớix\ge-1\)
\(F=\frac{a-2\sqrt{a}}{\sqrt{a}-2}vớia\ge0,\ne4\)
\(G=\frac{2}{\sqrt{3}+\sqrt{5}}-\frac{2}{\sqrt{5}-\sqrt{7}}\)