\[(x + 2)^{2} + (y - 1)^{2} = R^{2}\]
\[x = 1;y = 5:\]
\[R^{2} = 3^{2} + 4^{2} = 9 + 16 = 25.\]
\[Уравнение\ окружности:\]
\[(x + 2)^{2} + (y - 1)^{2} = 25.\]