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Scoate factor comun: 5x-10y+25z
7x+21y-56z
36x-9y+63z


Răspuns :

5x-10y+25z=5(x-2y+5z)

7x+21y-56z=7(x+3y-8z)

36x-9y+63z=9(4x-y+7z)