X 2 9x 2 20 0 July 8, 2019 16 32 64 128 X 2 9x 20 0 quadratic formula X 2 9x 20 0 completing the square X 2 9x 20 0 теорема виета X 2 9x 20 0 factored form X 2 9x 20 0 solve X 4 9x 2 20 0 X 2 9x 20 0 factoring X 2 9x 20 0 graph X 2 9x 20 0 discriminant X 2 9x 20 0 answer X 2 9x 20 0 solutions