( X – 2 )( X + 2 ) – ( 2X +1 )2 = X ( 2 – 3X ) 9/ ( X + 1...

8/ ( x – 2 )( x + 2 ) – ( 2x +1 )

²

= x ( 2 – 3x ) 9/ ( x + 1 )( x

²

– x + 1 ) – 2x = x ( x + 1 )( x – 1 )