Bonjour,
A= 3x +24 +28x +8
= 31x +32
B= 5x -5 -14x -21x²
= -21x² -9x -5
C= 8x -10x² -x +7
= -10x² +7x +7
D= 3-8x -20x +35
= -28x +38
E= 21 -14x -8x² +4x
= -8x² -10x +21
F= 7x -10 +45x +63x -7
= 115x -17
