Réponse :
Bonsoir
Explications étape par étape
A = -4/3 + 5/3 * 2/7
A = -4/3 + (5×2)/(3×7)
A = -4/3 + 10/21
A = (-4*7)/(3*7) + 10/21
A = -28/21 + 10/21
A = -18/21
A = -6*3/7*3
A = -6/7
B = (1 + 3/4)/(1-3/4)
B = ((1*4/4)+3/4))/((1*4/4)-3/4))
B = (4/4 + 3/4)/(4/4 - 3/4)
B = 7/4 / 1/4
B = 7/4 * 4
B = (7*4)/4
B = 7
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Réponse :
Bonsoir
Explications étape par étape
A = -4/3 + 5/3 * 2/7
A = -4/3 + (5×2)/(3×7)
A = -4/3 + 10/21
A = (-4*7)/(3*7) + 10/21
A = -28/21 + 10/21
A = -18/21
A = -6*3/7*3
A = -6/7
B = (1 + 3/4)/(1-3/4)
B = ((1*4/4)+3/4))/((1*4/4)-3/4))
B = (4/4 + 3/4)/(4/4 - 3/4)
B = 7/4 / 1/4
B = 7/4 * 4
B = (7*4)/4
B = 7