Question

Помогите пожалуйста! $frac{5 + sqrt{y} }{5sqrt{y + y}}$

$frac{asqrt{a} - 1}{a +sqrt{a} + 1}$

 

Answer 1

$frac{5+sqrt{y}}{5sqrt{y}+y}=frac{5+sqrt{y}}{sqrt{y}(5+sqrt{y})}=frac{1}{sqrt{y}}$

 

$frac{asqrt{a}-1}{a+sqrt{a}+1}=frac{(sqrt{a})^3-1}{a+sqrt{a}+1}=frac{(sqrt{a}-1)(a+sqrt{a}+1)}{a+sqrt{a}+1}=sqrt{a}-1$

 

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