Frac 9x 5 y 8 3xy July 8, 2019 16 32 64 128 Frac 9x^ 4 y^ 5 3x^ 8 y^ 3 3x8y39x4y5 Frac 9x^ 5 y^ 8 3xy 3xy9x5y8 Fractii algebrice clasa 9