1). 0,25x² - x + 1 = 0 2). -4x² + x/3 = 0 3). 2x² - 5x + 5 = 0
x² - 4x + 4 = 0 -12x² + x = 0 D = b²-4ac = 25-40 = -15
(x - 2)² = 0 x(1 - 12x) = 0 ∅ (корней нет)
x = 2 x = 0; x = 1/12
1). 0,25x² - x + 1 = 0 2). -4x² + x/3 = 0 3). 2x² - 5x + 5 = 0
x² - 4x + 4 = 0 -12x² + x = 0 D = b²-4ac = 25-40 = -15
(x - 2)² = 0 x(1 - 12x) = 0 ∅ (корней нет)
x = 2 x = 0; x = 1/12