Réponse:
A = -2/5 × 3/15 + 2/15 = -6/45 +2/15
A = -2/15 + 2/15 = 0
B = 9/2 -5/2 × 8/15
B = 9/2 - 40/30 = 9/2 - 4/3
B = 27/6 - 8/6 = 19/6
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Réponse:
A = -2/5 × 3/15 + 2/15 = -6/45 +2/15
A = -2/15 + 2/15 = 0
B = 9/2 -5/2 × 8/15
B = 9/2 - 40/30 = 9/2 - 4/3
B = 27/6 - 8/6 = 19/6