2 -1 - 2*x
-1 - 2*x^2
/ ___\ / ___\ | I*\/ 2 | | I*\/ 2 | |x + -------|*|x - -------| \ 2 / \ 2 /
(x + i*sqrt(2)/2)*(x - i*sqrt(2)/2)
-1.0 - 2.0*x^2