Sagot :

maudmarine

Bonsoir,

A = 2x - 3 + 8 - 4x + x²

A = x² + 2x - 4x - 3 + 8

A = x² - 2x + 5

B = 3x + 9 - 7x + 8 + 4x

B = 3x + 4x - 7x + 9 + 8

B = 17.

ecolestelme

Réponse : Cc, voilà la réponse

A = 2x - 3 + 8 - 4x + x2*

A = x2* + 2x - 4x - 3 + 8

A = x2* -2x + 5

( *x2 = x au carré )

B = 3x + 9 - 7x + 8 + 4x

B = 3x + 4x - 7x + 9 + 8

B = 7x - 7x + 17

B = 0 + 17

B = 17