The solutions of x^2- 8x + 20 = 0 can be written in the form x = a bi, where a and b are real numbers. What are the values of a and b?

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.