What is the conjugate of square root of 8 - square root of nine

The conjugate of x + y, where x and y are real numbers, is x - y. The sign of the second term is switched

So the conjugate of 8 - sqrt(9) is 8 + sqrt(9)

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 : )