[tex] \sqrt{(2- \sqrt{5})^2} + \sqrt{(3 \sqrt{3} -6 ) ^2} + \sqrt{(- \sqrt{5}-1)^2}= \\ \\ =|2- \sqrt{5}| +|3 \sqrt{3} -6|+|- \sqrt{5}-1|= \\ \\ = ( \sqrt{5}-2)+(6-3\sqrt{3})+( \sqrt{5}+1)= \\ \\ = 2 \sqrt{5}- 3 \sqrt{3}-5. \\ \\ Varianta~corecta~este~A.[/tex]
