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(-7/39+11/13).(-1intreg1/2)

Răspuns :

=(-7/39+33/39)*(-3/2)=
=26/39*(-3/2)=
=-13/13=
=-1
(-7\39+11\13)x(-1 1\2)=
(-7+33\39)x(-3\2)=
-26\39x(-3\2)=
-13\13=-1
succes