Помогите пожалуйста 12x^2-21x+9=0
12x²-21x+9=0 D = 21² - 4 * 12 * 9 D = 441 - 432 D = 9 = 3² x1 = (21 + 3) : (12 * 2) = 24 : 24 = 1 x2 = (21 - 3) : (12 * 2) = 19 : 24 = 0.75 Ответ: x1 =1 и x2 = 0.75
12x^2 - 21x + 9 = 0 4x^3 - 7x + 3 = 0 D = b^2 - 4ac = 49 - 48 = 1 x1 = ( 7 + 1) / 8 = 1 x2 = ( 7 - 1) / 8 = 0,75