Sagot :
Réponse :
Explications étape par étape :
Bonsoir
A =(-7)+7×(-3)+5×[-5+(-2)]
A = (-7) - 21 + 5 × [-7]
A = -7 - 21 -35
A = - 63
B= - 4+2×[-3×(5-7)-9]
B = - 4 + 2×[ - 3×(-2) -9]
B = - 4 + 2×[6 - 9]
B = - 4 + 2×[-3]
B = - 4 - 6
B = - 10
Réponse:
Bonsoir
A= (-7)+7×(-3)+5×[-5+(-2)]
= (-7)+7×(-3)+5×(-7)
= (-7)+(-21)+(-35)
= -63
B= -4+2×[-3×(5-7)-9]
= -4+2×[-3×(-2)-9]
= -4+2×[6-9]
= -4+2×(-3)
= -4+(-6)
= -10