X 3 x 2 5 7 2x
- 1 x 3 2 x 3 5 2x )/ 7
- 5 x 3 )- 2 x 7 )= 7 7 2x 6
- X 2 x 5 )( 2x 3 )( x 2 7 )= 0
- 17 2 x 3 )+ 5 x 7 )- 3 2x 1 )=- 28
- Prove 3 x 1 )( x 7 )-( 2x 5 2 is never positive
- 3 * 4 x 3 5 * 7 x 3 2 2x 4
- 2x 1 5 x 2 3 x 7 15
- 3x 2 x 5 )( 2x 7
- 5 x 3 )- 2 x 7 )= 7x 2 2x 1
- X 3 x 5 2x 7 3x 4 7 2
- X 3 2x 1 5 7 2x 2 x 6
- X 2x 2 16 3 x 5 3 7 2x
- 25 x 2 3 x 5 x 2x 7 0
- X 1 2 x 2 3 2x 5 7 9