$\sqrt{a}=b\text{gdy}{b}^2=a$  

$\sqrt[3]{a}=b\text{gdy}{b}^3=a$  

 

$\sqrt{x+3}=10$   

${10}^2=x+3$  
$100=x+3\mid -3$  
$x=97$  
$\underline{\underline{}}$  

$\sqrt{4y}=0,2$   

${0,2}^2=4y$  
$0,04=4y\mid :4$  
$y=0,01$  
$\underline{\underline{}}$  

$\sqrt[3]{z+5}=-1$  

${\left(-1\right)}^3=z+5$  
$-1=z+5\mid -5$  
$z=-6$  
$\underline{\underline{}}$  

$\sqrt[3]{\frac{t}{10}}=5$  

$5^3=\frac{t}{10}$  
$125=\frac{t}{10}\mid \cdot 10$  
$t=1250$