(2x-9)^2(x-9)=(2x-9)(x-9)^2
(2x - 9)(x - 9) (2x - 9 - x + 9) = 0 (2x - 9)(x - 9)(x - 9 + 9) = 0 x (2x - 9)(x - 9) = 0 x = 0 ; 2x - 9 = 0 2x = 9 x = 4,5 x - 9 = 0 x = 9