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Scoateti factorul comun in urmatoarele expresii:
8x+4y+2z 5x+10y+25z 7x+21y+56z 36x+9y-7x


Răspuns :

8x+4y+2z=2(4x+2y+z)

 5x+10y+25z=5(x+2y+5z)

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

 36x+9y-7x=27x+7x+9y-7x=27x+9y=9(3x-y)

 36x+9y+63z=9(4x+y+7z)