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Sagot :

Bonjour,

1)

1

1² =1

1+3 = 4

4+2 = 6

2)

-5

-5² = 25

25- 45 = -20

-20 +2 = -18

3)

x

x²

x +3x

x²+3x+2

4)

(x+2)(x+1) = x²  +x +2x +2 = x²+3x +2

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