Помогите пожалуйста! [latex]\frac{5 + \sqrt{y} }{5\sqrt{y + y}}[/latex] [latex]\frac{a\sqrt{a} - 1}{a +\sqrt{a} + 1}[/latex]  

[latex]\frac{5+\sqrt{y}}{5\sqrt{y}+y}=\frac{5+\sqrt{y}}{\sqrt{y}(5+\sqrt{y})}=\frac{1}{\sqrt{y}}[/latex]   [latex]\frac{a\sqrt{a}-1}{a+\sqrt{a}+1}=\frac{(\sqrt{a})^3-1}{a+\sqrt{a}+1}=\frac{(\sqrt{a}-1)(a+\sqrt{a}+1)}{a+\sqrt{a}+1}=\sqrt{a}-1[/latex]   ......................................................................................................