x² - 12x + 20 = x² - 12x + 36 - 16 = (x-6)² -4² = (x-6-4)(x-6+4) = (x-10)(x-2)
х² - 12х + 20=х²-10х-2х+20=х(х-10)-2(х-10)=(х-10)(х-2)
x² - 12x + 20 = x² - 12x + 36 - 16 = (x-6)² -4² = (x-6-4)(x-6+4) = (x-10)(x-2)
х² - 12х + 20=х²-10х-2х+20=х(х-10)-2(х-10)=(х-10)(х-2)