Sagot :
Bonjour,
P=
-5x+7-8+3x +x
=-x -1
Q=
3x +5-x-3x+3
= -x+8
R=
-4x² -2x² +3x -1 -2x +3
= -6x² +x +2
A= 50x +40
B=54x -54x²
C = 12x +21 +8x -36
= 20x -15
D= 14x² -35x -2x² +5x
= 12x² -30x
E= 6x² +14x +15x +35
= 6x² +29x +35
F= 10x² -35x +16x - 56
= 10x² -19x -56
Bonjour
P = - 5x + 7 - 8 + 3x + x
P = - 5x + 3x + x + 7 - 8
P = - x - 1
Q = 3x + 5 - x - 3x + 3
Q = 3x - 3x - x + 5 + 3
Q = - x + 8
R = - 4x² - 2x² + 3x - 1 - 2x + 3
R = - 6x² + x + 2
A = 50x + 40
B = 56x - 54x²
C = 12x + 21 + 8x - 36
C = 20x - 15
D = 14x² - 35x - 2x² + 5x
D = 14x² - 2x² - 35x + 5x
D = 12x² - 30x
E = 6x² + 14x + 15x + 35
E = 6x² + 29x + 35
F = 10x² - 35x + 16x - 56
F = 10x² - 19x - 56.