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Sagot :

Bonsoir,

Exercice 1

A= 3x-7x +5

= -4x +5

B= -2x +2 -5x

= -7x +2

C = 3* (-2)²  -4 *(-2) +5

= 3*4 +8 +5

= 12+8 +5

= 25

D = 15x -6

E= 3x -6 +10x

= 13x -6

F=8x -6x² -3x² +3x

=   -9x²  +11x

G=  7( 3 -4x)

H= x( 5x -2)

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