5 2x 2 )= 3 x 1 ) 7
- 5 2x 2 )= 3 x 1 )+ 7
- 5 2x 1 )- 3 3x 2 )= 7 x 4
- 2 x 1 )- 3 5 2x 1 )- 7x
- 2 3 4 x 2 )= 5 2x 1 2 7 4x
- 2x 3 3 7x 13 6 5 2x 2 x 1
- Prove 3 x 1 )( x 7 )-( 2x 5 2 is never positive
- 2x 5 7x 3 x 2 4x 1 x 2
- 0 7x 2 1 5 2x )+ 0 3 x 6
- 2x 1 5 x 2 3 x 7 15
- 5 2x 3 )( x 2 )- 2 5x 4 )( x 1 )= 75
- 4x 5 )( 2x 3 )- 4 x 2 )( 2x 1 )+( 10x 7
- 5 x 2 )- 2x 3 x 1 )= 6 7x
- 5x 7 2 2x 5 ) 2 3 x 1
- 4 x 3 5 2 2x 1 7
- 5 2x 1 )+ 7 2 3x )=- 3 x 3