bonjour
A = 5 x +2 - 6 x - 4
= - x - 2
B = - 5 x + 3 + 4 x - 5
C = 3 x + 4 - 8 x + 3
= - 5 x + 7
D = 5 x²+ 3 - 8 x² +2 x - 3
= - 3 x² + 2 x
A = 10 x + 35
B = 15 x² + 6 x
C = - 12 x + 20
D = 15 + 24 b
E = - 28 b² + 12 b
F = - 10 x² + 45 x
Bonjour,
Exercice 10
On retire les parenthèses
-(-) => +
-(+) => -
+(-) => -
+(+) => +
A =5x+2 -6x -4 = -x -2
B = -5x +3 +4x -5 = -x -2
C= +3x +4 -8x +3 = -3x +7
D = 5x² +3 -8x² +2x -3 = -3x² +2x
Exercice 11
distributivité
-*- =>+
+*+ => +
-*+ => -
A = 5*2x + 5*7 = 10x +35
même technique pour les autres
B= 15x² +6x
C= -12x +20
D= +15 +24b
E= -28b² +12b
F= -10x² +40x
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bonjour
A = 5 x +2 - 6 x - 4
= - x - 2
B = - 5 x + 3 + 4 x - 5
= - x - 2
C = 3 x + 4 - 8 x + 3
= - 5 x + 7
D = 5 x²+ 3 - 8 x² +2 x - 3
= - 3 x² + 2 x
A = 10 x + 35
B = 15 x² + 6 x
C = - 12 x + 20
D = 15 + 24 b
E = - 28 b² + 12 b
F = - 10 x² + 45 x
Bonjour,
Exercice 10
On retire les parenthèses
-(-) => +
-(+) => -
+(-) => -
+(+) => +
A =5x+2 -6x -4 = -x -2
B = -5x +3 +4x -5 = -x -2
C= +3x +4 -8x +3 = -3x +7
D = 5x² +3 -8x² +2x -3 = -3x² +2x
Exercice 11
distributivité
-*- =>+
+*+ => +
-*+ => -
A = 5*2x + 5*7 = 10x +35
même technique pour les autres
B= 15x² +6x
C= -12x +20
D= +15 +24b
E= -28b² +12b
F= -10x² +40x