\[1,5y² + 0,5 = 3y - 2,5y²\]
\[4y^{2} - 3y + 0,5 = 0\]
\[D = b^{2} - 4ac = 9 - 4 \cdot 4 \cdot 0,5 =\]
\[= 9 - 8 = 1\]
\[y_{1} = \frac{3 + 1}{8} = \frac{4}{8} = \frac{1}{2}\]
\[y_{2} = \frac{3 - 1}{8} = \frac{2}{8} = \frac{1}{4}\]
\[Ответ:при\ y = \frac{1}{2}\ \ и\ \ \ y = \frac{1}{4}.\]