Answer:
Step-by-step explanation:
1. [tex]4\sqrt{2}*\sqrt{2} = 4*\sqrt{2}^{2}=4*2=8[/tex]
2.[tex]3\sqrt{7} -2\sqrt{7} =(3-2) \sqrt{7} = 1*\sqrt{7} =\sqrt{7}[/tex]
3.[tex]\frac{\sqrt{7} }{2\sqrt{7} } =\frac{1}{2}[/tex]
4.[tex]2\sqrt{5} *2\sqrt{5} =2*2*\sqrt{5} *\sqrt{5}=4*5=20[/tex]
