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Sagot :

Réponse :

(x - 3)(2x + 5) + [4(2(x - 1))]​

= x*2x + x*5 - 3*2x - 3*5 + [4(2*x + 2*(-1))]​

= 2x² + 5x - 6x - 15 + (4*2x + 4*(-2))

= 2x² - x - 15 + 8x - 8

= 2x² + 7x - 23

j'espère avoir pu t'aider !

Bonjour,

-(x-3)(2x+5)+[4(2(x-1))]​

-(x-3)(2x+5)=

-( 2x² +5x -6x -15) =

-2x² +x +15

[4(2(x-1))]​ =

4 * (2x  -2)=

8x -8

-2x² +x +15 + 8x -8 =

-2x² +9x-+ 7

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