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Sagot :

VINS

Réponse :

bonjour

A = 5 x + 40

B = 8 x - 6 x²

C = 15 - 10 x + 3 x - 2 x² = - 2 x² - 7 x + 15

D = 49 - 42 x + 9 x²

E = 25 - 4 x²

F = 7 ( x - 9 )

G = ( x - 1 ) ( 2 x - 4 )

H = ( x + 3 )²

I = ( 5 x - 8 ) ( 5 x + 8 )

2 x + 2.05 + 0.55 = 4 x

2 x +2.05 + 0.55 = 4 x

2 x - 4 x = - 0.55 - 2.05

- 2 x = - 2.6

x = 1.3

Explications étape par étape :

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