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Sagot :

Bonjour:

1) (9x^2 - 12x +4) + (9x-9x^2
9x^2 - 12x + 4 + 9x - 9x^2
= -3x + 4

2) -36 - 10 - 1
-36 + (-10) + (-1)
- 47

3) 246/1000=123/500

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