(⅗)²-⅗² +⅗₂=
(3/5)^2-(3/5)^2+(3/5)^2=
źródło:
(\frac{3}{5})^2-(\frac{3}{5})^2+(\frac{3}{5})^2=0+\frac{9}{25}=\frac{9}{25}=0,36