Il me semble que c'est ça :)
Explications étape par étape:
A = 4/7 - (3/7 × 3)
A = 4/7 - 9/7 = -5/7
D = [ (14×3)/(6×3) - (3×2)/(9×2)] × -3/4
D = ( 42/18 - 6/18) × -3/4
D = 36/18 × -3/4
D = 2 x -3/4 = -6/4 = -3/2
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Il me semble que c'est ça :)
Explications étape par étape:
A = 4/7 - (3/7 × 3)
A = 4/7 - 9/7 = -5/7
D = [ (14×3)/(6×3) - (3×2)/(9×2)] × -3/4
D = ( 42/18 - 6/18) × -3/4
D = 36/18 × -3/4
D = 2 x -3/4 = -6/4 = -3/2