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Sagot :

VINS

Réponse :

bonjour

(x - 5 ) ² =  ( 2 x + 7 ) ²

( x - 5 )² - ( 2 x + 7) ² = 0

= ( x -5 + 2 x + 7 ) ( x - 5 - 2 x - 7) = 0

= ( 3 x + 2 ) ( - x - 12 ) = 0

donc x = -2/3  ou  x = - 12

7/( x + 8 ) = 2/3

2 x + 16 = 21

2 x = 21 -16

2 x = 5

x = 5/2

x/6 + 2 = 4

x /6 + 12/6 = 24/6

x = -24-12

x = -36

Explications étape par étape :

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