Найдите корни уравнения 9х^2-10х+1=0
D = b^2-4ac = 100-4*9*1 = 100-36 = 64 x1 = (-b + √D)/2a = (10+8)/18 = 1 x2 = (-b-√D)/2a = (10-8)/18 = 1/9