2 x - 4*x - 4
x^2 - 4*x - 4
/ ___\ / ___\ \x + -2 + 2*\/ 2 /*\x + -2 - 2*\/ 2 /
(x - 2 + 2*sqrt(2))*(x - 2 - 2*sqrt(2))
2 -4 + x - 4*x
-4 + x^2 - 4*x
-4.0 + x^2 - 4.0*x
-4 + x*(-4 + x)