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Dati factor comun in urmatoarele expresii.

15a-7a=

6x+6y-6z=

50a-25a=



Răspuns :

15a-7a=a(15-7)=8a
6x+6y-6z=6(x+y-z)
50a-25a=a(50-25)=25a
a(15-7)=8a

6(x+y-z)

a(50-25)=25a