Bonjour,
Ex.1
A= 4x -(6x -7) -7
A= 4x -6x +7 -7
A= -2x
B= -(7x -8) +6x -3
B= -7x +8 +6x -3
B= -x +5
C= -5x -(-x -3) -6
C= -5x +x +3 -6
C= -4x -3
D= 8 +(10x +10) -3x
D= 8 +10x +10 -3x
D= 7x +18
E= -9 +(2x -3) -2x
E= -9 +2x -3 -2x
E= -12
F= -5 -(3x -9) -6x
F= -5 -3x +9 -6x
F= -9x +4
Ex.2
(x = la lettre, * le signe "fois" ou "multiplication")
A= 4x * 8
A= 32x
B= 6 * 9x
B= 54x
C= 4 * ( -4x -2) +7x
C= -16x -8 +7x
C= -9x -8
D= 6x -1 +(5x +10) * 6
D= 6x -1 +30x +60
D= 36x +59
E= 9 +(-4x +10) * 9
E= 9 -36x +90
E= -36x +99
Ex.3
A= 9x * x
A= 9x²
B= 2x * 6x
B= 12x²
C= x +6 +(-3x +1) * (-5x -2)
C= x +6 +15x² +6 -5x -2
C= 15x² -4x +10
D= 6 +(-x +1) * (-4x +3)
D= 6 +4x² -3x -4x +3
D= 4x² -7x +9
E= (-3x -10) * (10x -5) +2x
E= -30x² +15x -100x +50 +2x
E= -30x² -83x +50
Ex.4
A= 9x -12
A= 3 * (3x - 4)
B= 16x² -12x
B= 4 * (4x² - 3)
C= 24a² - 6a
C= 6a * (4a - 1)
D= -32xy + 16x²
D= 16x * (x - 2y)
En espérant t'avoir aidé!
