Tính
a)\(\sqrt{36-16\sqrt{5}}\)
b)\(\sqrt{\frac{-2}{-75}}.\sqrt{\frac{0,3}{0,6}}.\sqrt{\frac{121}{32}}\)
c)\(\left(\frac{\sqrt{5}+\sqrt{18}}{\sqrt{8}-\sqrt{5}}+\frac{\sqrt{8}-\sqrt{5}}{\sqrt{5}+\sqrt{8}}\right):\sqrt{13^3:\left(-27\right)}\)
d)\(\left(\sqrt{20}+\sqrt{8}-5\sqrt{2}\right)\sqrt{5}-\left(3\sqrt{\frac{1}{10}+10}\right)\)
e)\(\frac{a}{\sqrt{a^2-b^2}}-\left(1+\frac{a}{\sqrt{a^2-b^2}}\right):\frac{b}{a-\sqrt{a^2-b^2}}\)
b)
<=> can(2/75)*can(1/2)*can(121/32)
<=>can(2*1*121)/can(2*75*32)=can(121/2400)
c) cau nay sai de bai roi, em check lai ngoac thu 2 xem