Ответы и объяснения

2014-01-19T14:32:13+00:00
400/x(1 + 2x + x^2) = 5832
400 + 800x + 400x^2/x = 5832
400 + 800x + 400x^2 = 5832x
400 + 800x + 400x^2 - 5832x = 0
400x^2 - 5032x + 400 = 0    / 400
x^2 - 12.58x + 1 = 0
d= 158.2564 - 4= 154.2564
x1= 12.58 - 12.42 /2 = 0.08
x2= 12.58+ 12.42/2= 12.5