Bonsoir,
A= -2/3 + 3/7
= -14/21 + 9/21= -5/21
B= -7/6 X-4/-7
= -7/6 * 4/7
= -28/ 42 = -14/21
C= 3 - 4/9 X 3/2
=3 -12/18
= 54/18 - 12/18 = 42/18 = 21/9 = 7/3
D= (-2/3+7/3) : 4/21
= (5/3)/(4/21 )
= 5/3 *21/4
= 105/12 = 35/4
Réponse :bjr
Explications étape par étape :
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Bonsoir,
A= -2/3 + 3/7
= -14/21 + 9/21= -5/21
B= -7/6 X-4/-7
= -7/6 * 4/7
= -28/ 42 = -14/21
C= 3 - 4/9 X 3/2
=3 -12/18
= 54/18 - 12/18 = 42/18 = 21/9 = 7/3
D= (-2/3+7/3) : 4/21
= (5/3)/(4/21 )
= 5/3 *21/4
= 105/12 = 35/4
Réponse :bjr
Explications étape par étape :