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Sagot :

Bonsoir,

1)

x² +3x +2x +6

= x² +5x+6

2)

x² +5x -x -5

= x² +4x 65

3)

6x +2x² +12 +4x

= 2x² +10x +12

4)

x² -5x -7x +35

= x² -12x +35

5)

3 -15x +5x -25x²

= -25x² -10x +3

6)

8x +72 +2x² +18x

= 2x² +26x +72

7)

9x² -81 +2x -18

= 9x² +2x -99

8)

x -2 -64x + 56x²

= 5-x² -63x -2

9)

56 -49x -64x +56x²

= 56x² -113x +56

10 = 9x² +12x +4

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