25xкуб - 10xквадрат + x=0
25x^3 - 10x^2 + x = 0 x (25x^2 - 10x + 1) = 0 x*(5x - 1)^2 = 0 1) x = 0 2) (5x - 1)^2 = 0 5x - 1 = 0 5x = 1 x = 1/5 = 0,2