Ответы и объяснения

2012-11-28T13:47:40+04:00

 

x = (6-x)^2

x = x^2-12 x+36

-x^2+13 x-36 = 0

((x-9) (x-4)) = 0

 (x-9) (x-4) = 0

x-9 = 0  x-4 = 0

x = 9 x-4 = 0

x = 9  x = 4

ответ x = 9. x = 4