уравнение
(х-2)(х-3)=х(х+1)
(х-5)(х+1)-х=х^2+5

1) (x-2)(x-3) = x(x+1) x^2 - 5x + 6 = x^2 + x 6x = 6 x = 12) (x-5)(x+1) - x = x^2 + 5 x^2 - 4x - 5 - x = x^2 + 5 -5x - 5 = 5 -5x = 10 x = -2