Réponse :
B= (7x5x10(-3)x3x10(5)) / (7x3x10(-1))
simplifions le 7 et le 3, il reste :
B= (5x10(-3)x10(5)) / (10(-1))
B = 5x 10 (-3+5+1) = 5x 10(3)
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Réponse :
B= (7x5x10(-3)x3x10(5)) / (7x3x10(-1))
simplifions le 7 et le 3, il reste :
B= (5x10(-3)x10(5)) / (10(-1))
B = 5x 10 (-3+5+1) = 5x 10(3)