1)(3x-5)(2x-1)=0 2) (3x-5)(2x-1)=5 3) (3x-5)(2x-1)=2x-1 -решите уравнения

1) (3x - 5)(2x - 1) = 0 3x - 5 = 0 3x = 5 x = 5/3 2x - 1 = 0 2x = 1 x = 1/2 2) ( 3x - 5)(2x - 1) = 5 6x^2 - 13x + 5 - 5 = 0 6x^2 - 13x = 0 x(6x - 13) = 0 x = 0 6x - 13 = 0 6x = 13 x = 13/6 x = 2целых 1/6 3) (3x - 5)(2x - 1) = 2x - 1 6x^2 - 13x + 5 - 2x + 1 = 0 6x^2 - 15x + 6 = 0 D = b^2 - 4ac = 225 - 144 = 81 = 9^2 x1 = ( 15 + 9)/ 12 = 2 x2 = ( 15 - 9) / 12 = 0,5