\(\left(3\sqrt{5}+2\sqrt{6}+\sqrt{69}\right)\times\left(3\sqrt{5}+2\sqrt{6}-\sqrt{69}\right)\)

Tính

thực hiện phép tính:

\(\left(\sqrt{3}-2\right)\times\left(\sqrt{6}+\sqrt{2}\right)\sqrt{2+\sqrt{3}}\)
\(\sqrt{\frac{\sqrt{5}}{8\sqrt{5}+3\sqrt{35}}}\times\left(3\sqrt{2}+\sqrt{14}\right)\)

\(\frac{\left(\frac{1}{14}-\frac{\sqrt{2}}{7}+\frac{3\sqrt{2}}{35}\right)\times\left(\frac{-4}{15}\right)}{\left(\frac{1}{10}+\frac{3\sqrt{2}}{25}-\frac{\sqrt{2}}{5}\right)\times\frac{5}{7}}\)

1)tính kết quả:

a, A=\(2\times\sqrt{a}-3\times\sqrt{16}+5\times\sqrt{31}\)

b, B=\(\left(\sqrt{\frac{1}{16}}+\sqrt{\frac{4}{25}}\right)\div\sqrt{\frac{25}{36}}\)

c, \(\left(\sqrt{5}\right)^2-\left(2\times\sqrt{3}\right)^2+\left(4\times\sqrt{2}\right)^2\)

tính

\(\sqrt{2}\) ✖ (\(\sqrt{21}+3\)) ✖ \(\sqrt{5-\sqrt{21}}\)

\(\sqrt{2}\times\left(\sqrt{5}-1\right)\times\sqrt{3+\sqrt{5}}\)

\(\sqrt{46-6\sqrt{5}}-\sqrt{29-12\sqrt{5}}\) \(\sqrt{13-\sqrt{160}-\sqrt{53+4\sqrt{90}}}\) \(\left(\sqrt{3+}\sqrt{5}\right)\times\sqrt{7-2\sqrt{10}}\) \(\left(\sqrt{7}-\sqrt{3}\right)\times\sqrt{10+2\sqrt{21}}\)

\(\left(2+\sqrt{3}-\sqrt{2}\right)\times\left(2-\sqrt{3}-\sqrt{2}\right)\times\left(3+\sqrt{2}\right)\times\sqrt{3-2\sqrt{2}}\)

Giá trị của biểu thức \(Â=9-2\sqrt{18}\times\sqrt{9+6\sqrt{\left(\sqrt{5}-\sqrt{3}\right)\times\left(\sqrt{5}+\sqrt{3}\right)}}\) = ...