Sagot :
[(-5)+4-(-3)-7]-[(-5)+4-(-3)-7]
=[(-5)+4+3-7]-[(-5)+4+3-7]
=(-1-4)-(-1-4)
=(-5)-(-5)
=(-5)+5
=0
[(-5)+4-(-3)-7]-[(5)+4+(3)-7]
=[(-5)+4+3-7]-[(5)+4+3-7)
=(-1-4)-(9-4)
=(-5)-5
=(-5)-5
=-10
bonsoir
a_[(-5)+4-(-3)-7]-[(-5)+4-(-3)-7]
= -5 + 4 + 3 - 7 - (-5 + 4 + 3 - 7)
= -5 - 7 + 4 + 3 + 5 - 4 - 3 + 7
= -5 + 5 - 4 + 4 - 7 + 7 + 3 - 3
= 0
b_ [(-5)+4-(-3)-7]-[(5)+4+(3)-7]
= -5 + 4 + 3 - 7 - (5 + 4 + 3 - 7)
= -5 - 7 + 4 + 3 - 5 - 4 - 3 + 7
= -5 - 5 + 3 - 3 + 4 - 4 + 7 - 7
= -10