(a) Show that the equation \(\log_3(2x + 1) = 1 + 2\log_3(x - 1)\) can be written as a quadratic equation in \(x\).

(b) Hence solve the equation \(\log_3(4y + 1) = 1 + 2\log_3(2y - 1)\), giving your answer correct to 2 decimal places.