Tính các căn bậc hai sau:

⚡$\sqrt{81 . 49} =$ ;

⚡$\sqrt{25 . 121}=$ ;

⚡$\sqrt{2^2 .3^2 . 5^2}=$ .

Tính.

⚡$\sqrt{360 . 90}=$ .

⚡$\sqrt{8,1 . 10^3}=$ .

⚡$\sqrt{12,1 .160}=$ .

Tính.

⚡$\sqrt{2 \, 500 . 4,9 . 0,9}=$ ;

⚡$\sqrt{81 . 6,25-2,25 . 81}=$ .

Tính.

$\Big( \sqrt{\dfrac{2}{3}}+\sqrt{\dfrac{50}{3}}-\sqrt{24} \Big).\sqrt{6}=$ .

Tính.

⚡$\sqrt{\sqrt{2}-1}.\sqrt{\sqrt{2}+1}=$ .

⚡$2\sqrt{2}.(\sqrt{3}-2)+{{(1+2\sqrt{2})}^{2}}-2\sqrt{6}=$ .

Tính.

⚡$\sqrt{5} .\sqrt{20}=$ ;

⚡$\sqrt{72} . \sqrt{50}=$ ;

⚡$\sqrt{27} . \sqrt{3}=$ ;

⚡$\sqrt{3} . \sqrt{75}=$ .

Tính.

⚡$\sqrt{1,3} . \sqrt{10} . \sqrt{13}=$ ;

⚡$\sqrt{10} . \sqrt{5,2} . \sqrt{52}=$ .

Tính.

⚡$\sqrt{5}\Big( \sqrt{125}+\sqrt{5} \Big)=$ .

⚡$\left( \sqrt{20}+\sqrt{45}-\sqrt{5} \right). \sqrt{5}=$ .