2 x 2 + 4 x - 96 = 2 ( x 2 + 2 x - 48 )
<=> x 2 + 2 x - 48 = 0
<=> x 2 + 2 x = 48
<=> x 2 + 2 x + 1 = 49
<=> ( x + 1 ) 2 = 49
<=> x + 1 = ± 7
<=> x = ± 7- 1
<=> x = - 8 oder x = 6
=>
x 2 + 2 x - 48 = ( x + 8 ) ( x - 6 )
=> 2 x 2 + 4 x - 96 = 2 ( x 2 + 2 x - 48 ) = 2 ( x + 8 ) ( x - 6 ) = ( 2 x + 16 ) ( x - 6 )