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Sagot :

2(4a+2b)+3(6a-b)+a(2+b)

8a+4b+18a-3b+2a+ab

26a+b +ab

 

4(2x+3y+4)+3(5x+2y-5)

8x+12y+16+15x+6y-15

23x+18y+1

 

3x(5x+3+6x²+2)

15x²+9x+18xau cube+6x

 

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