bonjour 19 pts URGENT svp A= 2(x+8)-(x+6) B= 5(x-1)+3(x+1) C= x-4(x-3)+3(x-2) D= 5x-2(x+2) E= 3(5x+7)-(x-1)(2x+2)
Mathématiques
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Question
bonjour 19 pts URGENT svp
A= 2(x+8)-(x+6)
B= 5(x-1)+3(x+1)
C= x-4(x-3)+3(x-2)
D= 5x-2(x+2)
E= 3(5x+7)-(x-1)(2x+2)
A= 2(x+8)-(x+6)
B= 5(x-1)+3(x+1)
C= x-4(x-3)+3(x-2)
D= 5x-2(x+2)
E= 3(5x+7)-(x-1)(2x+2)
2 Réponse
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1. Réponse loulakar
A = 2x + 16 - x - 6
A = x + 10
B = 5x - 5 + 3x + 3
B = 8x - 2
B = 2 (4x - 1)
C = x - 4x + 12 + 3x - 6
C = 6
D = 5x - 2x - 4
D = 3x - 4
E = 15x + 21 - (2x^2 + 2x - 2x - 2)
E = 15x + 21 - 2x^2 + 2
E = -2x^2 + 15x + 23 -
2. Réponse PAU64
A = 2 (x + 8) - (x + 6)
A = 2 X x + 2 X 8 - x - 6
A = 2x + 16 - x - 6
A = x + 10
B = 5 (x - 1) + 3 (x + 1)
B = 5 X x + 5 X (- 1) + 3 X x + 3 X 1
B = 5x - 5 + 3x + 3
B = 8x - 2
C = x - 4 (x - 3) + 3 (x - 2)
C = x - 4 X x - 4 X (- 3) + 3 X x + 3 X (- 2)
C = x - 4x + 12 + 3x - 6
C = 6
D = 5x - 2 (x + 2)
D = 5x - 2 X x - 2 X 2
D = 5x - 2x - 4
D = 3x - 4
E = 3 (5x + 7) - (x - 1) (2x + 2)
E = 3 X 5x + 3 X 7 - [x X 2x + x X 2 - 1 X 2x - 1 X 2]
E = 15x + 21 - (2x² + 2x - 2x - 2)
E = 15x + 21 - 2x² - 2x + 2x + 2
E = - 2x² + 15x + 23