How to solve for this

Factor the polynomial expression x6 – x3 – 20

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge

Nina has prepared the following two-column proof below. she is given that ∠oln ≅ ∠lno and she is trying to prove that ol ≅ on. triangle oln, where angle oln is congruent to angle lno nina made two errors in the proof. identify and correct the errors.