X квадрат-10x+25-x+3=0
X^2 - 10x + 25 - x + 3 = 0 x^2 - 11x + 28 = 0 D = 121 - 4*28 = 9 x1 = (11 + 3)/2 = 14/2 = 7 x2 = (11 - 3)/2 = 8/2 = 4