Re bonjour pourriez vous m’aider à faire ces 4 exercices que je ne comprends pas du tout .Merci à ce qui m’aideront et ce qui auront essayé.
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Réponse :
bonsoir
Explications étape par étape
ex 3
(x+3)(x+4)
x²+4x+3x+12
x²+7x+12
(2x-1)(3x+5)
6x²+10x-3x-5
6x²+7x-5
(-x+1)(2x-4)
-2x²+4x+2x-4
-2x²+6x-4
ex 4
A=(2x+3)+(3x+2)
2x+3+3x+2
5x+5
B=-(3x-1)+(4x-2)
-3x+1+4x-2
x-1
C=-(-2x-4)-(-2x+1)
+2x+4+2x-1
4x+3
D=(-6+3x)+(4-2x)
-6+3x+4-2x
x-2
Bonsoir,
Exercice 1 :
A = 4x - 3 - 3x + 4
A = x + 1
B = - 3x + 2 + x - 5
B = -2x - 3
C = - 9x + x - 8 + 5x
C = - 3x - 8
D = 2 - 2x - 4x + 4 - x
D = - 7x + 6
Exercice 2 :
E = 4(x-3)
E = 4x - 12
F = 3 (x+2)
F = 3x + 6
G = 3(x - 8) + 5
G = 3x - 24 + 5
G = 3x - 19
H = 2 (2 - 4x) + 4 (1 - x)
H = 4 - 8x + 4 - 4x
H = - 12x + 8
Exercice 3 :
I = (x + 3)(x + 4)
I = x² + 4x + 3x + 12
I = x² + 7x + 12
J = (2x - 1)(3x + 5)
J = 6x² + 10x - 3x - 5
J = 6x² + 7x - 5
K = (-x + 1)(2x - 4)
K = -2x² + 4x + 2x - 4
K = - 2x² + 6x - 4
Exercice 4 :
A = (2x + 3) + (3x + 2)
A = 2x + 3 + 3x + 2
A = 5x +5
B = -(3x - 1) + ( 4x - 2)
B = - 3x +1 + 4x - 2
B = x - 1
C = -(-2x - 4) - (-2x + 1)
C = 2x + 4 + 2x - 1
C = 4x + 3
D = (-6 + 3x) + (4 - 2x)
D = -6 + 3x + 4 - 2x
D = x - 2