X2 3x 2 x 2 0 July 8, 2019 16 32 64 128 3x 2 x 2 0 3x 2 x 2 0 quadratic formula 3x 2 x 2 0 completing the square 3x 2 x 2 0 solve X2 3x 2 16 x 2 3x )- 36 0