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Sagot :

VINS

bonjour

1 - ( x + 5 ) ( 2 x + 1 ) + ( x - 1 ) ( x + 5 )

1 - ( 2 x² + x + 10 x + 5 ) + ( x² + 5 x - x - 5 )

1 - 2 x²  - 11 x - 5 + x² + 4 x - 5

= - x² - 7 x - 9

K = 2 x + 1 + 5 x + 3

 =  7 x + 4

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