F(x)=x^ 2 -2x+3;f(x)=-2x+12

If you set them equal to each other, then x^2 - 2x + 3 = 2x + 12:
x^2 = 9
x = -3, 3

Skew lines(segments) are lines(segments) in 3 dimensions that do not intersect the given segment and are not parallel to it.  ae, bf, eg, and fh are your skew segments.  i hope that : )