Répondre :
1) (2x-1)²-16
(1-1)²-16=0²-16=-16
2) (2x-1)²-16
4x²-4x+1-16
4x²-4x-15
3) (2x-1)²-16
[ (2x-1)-4][(2x-1+4]
(1-1)²-16=0²-16=-16
2) (2x-1)²-16
4x²-4x+1-16
4x²-4x-15
3) (2x-1)²-16
[ (2x-1)-4][(2x-1+4]