Multiplying & Dividing Radicals

Simplify: $$\sqrt[]{5}\times\sqrt[]{10}$$

​ ​ ​ ​ ​ (a)   $$\sqrt[]{}$$ ​ (b)  

Simplify: $$3\ \sqrt[]{12}\times\sqrt[]{6}$$

​ ​ ​ ​ ​ ​ (a)   $$\sqrt[]{}$$ ​ (b)  

Simplify: $$4\ \sqrt[]{15}\times3\ \sqrt[]{3}$$

​ ​ ​ ​ ​ ​ ​ (a)   $$\sqrt[]{}$$ ​ ​ (b)  

Multiply and simplify: $$\sqrt{3}\cdot\sqrt{15}$$  

Multiply and simplify: $$2\sqrt{12}\cdot\sqrt{5}$$  

Multiply and simplify: $$-2\sqrt{3}\cdot4\sqrt{18}$$  

Multiply and simplify: $$3\sqrt{7}\cdot\sqrt{14}$$  

$$\left(10-3\sqrt{2}\right)\left(10+3\sqrt{2}\right)$$  

Multiply then simplify the radicals.