and 
![=\frac{1}{\sqrt{5}}(\sqrt{10}+\sqrt{5}-\sqrt{10}+\sqrt{5})-\frac{2}{5}[(\sqrt{10})^2-(\sqrt{5})^2)]](/tpl/images/1389/6383/9072b.png)
Pls solve the above question
Kindly don't spam+_+
...
Answers: 2
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