(x-2)(x-3) = 12x² - 5x + 6 = 12x² - 5x - 6 = 0(x + 1)(x - 6) = 0x = 6 或 x = -1
(x-2)(x-3)=12x^2-5x+6=12x^2-5x-6=0(x+1)(x-6)=0x=-1或x=6