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Sagot :

Bonjour,

A(x)= 12x+3(x-2)-7(2x-5)

= 12x +3x -6 -14x +35

=  x +29

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

=  3x² -2x +15x -10 +5x² +3x +25x +15

= 8x²  +41x +5

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