Ответы и объяснения

2013-01-27T07:47:27+00:00

\sqrt[2]{x} = 3 - x

x = 9 - 6x +x^2

x^2 - 7x + 9 = 0

D = 49 - 36 = 13

x1, 2 = (7+/- /sqrt[2]{D})/2