Решите уравнение 5x^2-21x+22=0 . Срочно !
5x²-21x+22 = 0 D = b²-4ac a = 5; b=-21; c=22 D= (-21)²-4*5*22 = 1 √D = 1 x1 = (-b+√D)/2a = (21+1)/2*5 = 2.2 x2 = (-b-√D)/2a = (21-1)/2*5 = 2