( x + 2 ) 2 3 · ( x + 2 ) · ( x 2 ) + ( x 2 ) 3 x 2 · ( x 8 ) 4 · ( 4 x + 2 ) =

= x 2 + 4 + 4 x 3 ( x 2 4 ) + x 3 6 x 2 + 12 x 8 x 3 + 8 x 2 16 x 8 =

= x 2 + 4 + 4 x 3 x 2 + 12 + x 3 6 x 2 + 12 x 8 x 3 + 8 x 2 16 x 8 =

= ( 1 1 ) x 3 + ( 1 3 6 + 8 ) x 2 + ( 4 + 12 16 ) x + ( 4 + 12 8 8 ) = 0