3х(3х-7) - 2х(х - 2) - 6(х-2)(3х-7) = 0
9х^2 - 21x - (2x^2 - 4x) - 6(3x^2 - 13x + 14) = 0
9x^2 - 21x -2x^2 + 4x - 18x^2 + 78x - 84 = 0
-11x^2 + 61x - 84 = 0
11x^2 - 61x + 84 = 0
D = 3721 - 4(84)(11) = 3721 - 3696 = 25; Y25 = 5
x1 = (61 + 5)/ 22 = 66/22 = 3
x2 = (61 - 5)/22 = 56/22 = 2 6/11
Ответ: х1 = 3; х2 = 2 6/11