Répondre :
5 ( x - 3) + ( x + 2) (x - 4) =
5x -15 + (x² -4x +2x -8)
5x -15 +x² -4x +2x -8
x² +3x -23
5x -15 + (x² -4x +2x -8)
5x -15 +x² -4x +2x -8
x² +3x -23