9х2-12х+4 помогите решить
9x² - 12x + 4 = 0 D = b²-4ac = 144-144 = 0 x₁ = x₂ = -b/2a = 12/18 = 2/3 9x² - 12x + 4 = 9(x - 2/3)² = (3x - 2)²