Factor the expression completely: n4−2n2−15n^4 - 2n^2 - 15n4−2n2−15.
(n2−5)(n2+3)(n^2 - 5)(n^2 + 3)(n2−5)(n2+3)
(n2+5)(n2−3)(n^2 + 5)(n^2 - 3)(n2+5)(n2−3)
(n−5)(n+5)(n2+3)(n - \sqrt{5})(n + \sqrt{5})(n^2 + 3)(n−5)(n+5)(n2+3)
(n2−3)(n2−5)(n^2 - 3)(n^2 - 5)(n2−3)(n2−5)