2x 4 x 2 1 0
- 2x 4 4x 2 1 0
- 2x 3 2 4 x 1 2 0
- 2x 2 4x 1 0
- 2x 2 4x 1 0 completing the square
- 2x 2 4x 1 0 quadratic formula
- 2x 2 4x 1 0 discriminant
- 2x 3 4x 2 1 0
- X 2 4x 4 2x 2 x 1 0
- 4 * 2 2x 5 * 2 x 1 0
- X 1 4 x 2 2x 13 0
- X 4 x 3 2x 2 3x 1 0
- X 5 x 4 2x 3 2x 2 x 1 0
- 4x 8 4 2x x 2 1 0
- 2x 3 x 2 4x 1 0
- 9 2x 1 2 4 x 1 2 0