[tex]\frac{ -0,5y^2-2,4y+1 }{-4} =(-\frac{ 5}{10}:(-4)y^2)-(\frac{24}{10}:(-4)y)-\frac{1}{4}=\\\\= (-\frac{ 1}{2}*(-\frac{1}{4}) y^2 -(\frac{\not{12}^3}{5}*(- \frac{1}{\not{4}^1})y )-\frac{1}{4}=\frac{\boxed{1}}{\boxed{8}}y^2+\frac{\boxed{3}} {\boxed{5}}y-\frac{\boxed{1}}{\boxed{4}}[/tex]
