(4 > -(4 + X)·X)) = true
(30 > X·X) = false
4> -4x-x^2
x^2+4x+4>0
(x+2)^2>0
x<>-2
(30 < X·X)
|x|> root(30)~5.47
x = 6
(4 > -(4 + X)·X)) = true
(30 > X·X) = false
4> -4x-x^2
x^2+4x+4>0
(x+2)^2>0
x<>-2
(30 < X·X)
|x|> root(30)~5.47
x = 6