$\frac{6}{5};-2\frac{4}{5}$  

 $-1\frac{1}{5};\ 2\frac{4}{5}$  

 $-1\frac{1}{5}\ ;\ 2\frac{4}{5}$  

 $-1\frac{2}{5};-2\frac{4}{5}$  

20

4

 $\sqrt{5}$  

8

- 4

4

-12;12

- 4;4