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Sagot :

Réponse :

Bonjour

Explications étape par étape

Je t'en fais 2 exos

A = 4x -3 -3x +4

A = x +1

Pour x = 3 A = 3 + 1 = 4

B = -3x +2 +x -5

B = -2x -3

Pour x = 3 B = -2 X 3 -3 = -6 -3 = -9

C = -9x +x -8 +5x

C = -3x -8   pour x = 3 C = -3 X 3 -8 = -9 -8 = -17

D = 2 -2x -4x +4 -x

D = -7x +6 Pour x = 3 D = -7 X 3 +6 = -21 + 6 = -15

Exo 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

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