Exercice 2: Développer, réduire : A = 2+3(5x-1)-(7x-2); B = 4x(3 - x) - 5 (2x +1); C = (2x-9) (9+5x)-(10x² + 3x - 4); D=81-2x-3)-(x-6)(5x+4).
Mathématiques
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Question
Exercice 2: Développer, réduire :
A = 2+3(5x-1)-(7x-2);
B = 4x(3 - x) - 5 (2x +1);
C = (2x-9) (9+5x)-(10x² + 3x - 4);
D=81-2x-3)-(x-6)(5x+4).
A = 2+3(5x-1)-(7x-2);
B = 4x(3 - x) - 5 (2x +1);
C = (2x-9) (9+5x)-(10x² + 3x - 4);
D=81-2x-3)-(x-6)(5x+4).
1 Réponse
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1. Réponse jossaikaloudjnethoby
Réponse:
A=2+3(5×-1)-(7×-2)
=2+15×-3-7×+2
=15×-7×+2-3+2
[=8×+1]
B=4×(3-×)-5(2×+1)
=12×-4ײ-10×-5
[=-4ײ+2×-5]
C=(2×-9)(9+5×)-(10ײ+3×-4)
=18×+10ײ-81-45×-10ײ-3×+4
=10ײ-10ײ+18×-45×-3×-81+4
=18×-48×-77
[=-30×-77]