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Sagot :

1)
A= -0.66
B= 0.86
C= -2.33
D= 3.62
E= -1.75

2)
E+C = -1.75+(-2.33)=-4.08
ExC= -1.75x(-2.33)=4.08
E:C = -1.75:(-2.33)=0.75

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