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Sagot :

VINS

bonjour

tu remplaces simplement x  par  3

2 x  = 2*3 = 6

x² = 3*3 =  9

5 x - 1 = 15 - 1 = 14

5 x - 5 = 15 - 5 = 10

MAUDMARINE

Bonjour,

Calculer les expressions suivantes pour x=3

a:2x = 2 * 3 = 6

b: x² = 3² = 9

c:5x-1 = 5 * 3 - 1 = 15 - 1 = 14

d:5(x-1) = 5 (3 - 1) = 5 * 2 = 10.

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