Factor n 3 - n 2 + 3n - 3. (n2 - 3)(n - 1) (n2 + 3)(n - 1) (n2 + 1)(n - 3)

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.