1) -2v5+v5=-v5
-2v5-v5=-3v5
-2v5*v5=-2*5=-10
-2v5\v5=-2
2)=5v5+3v5-4v3=4v5
3)=(v13)^2-(3v3)^2=13-27=-14-целое
1) -2v5+v5=-v5
-2v5-v5=-3v5
-2v5*v5=-2*5=-10
-2v5\v5=-2
2)=5v5+3v5-4v3=4v5
3)=(v13)^2-(3v3)^2=13-27=-14-целое