2 x - 2*x + 7
x^2 - 2*x + 7
/ ___\ / ___\ \x + -1 + I*\/ 6 /*\x + -1 - I*\/ 6 /
(x - 1 + i*sqrt(6))*(x - 1 - i*sqrt(6))
2 7 + x - 2*x
7 + x^2 - 2*x
7 + x*(-2 + x)
7.0 + x^2 - 2.0*x