question_answer

\[45\,\,xyz\,\,(xy+yz+xz+{{z}^{2}})(z+x)\]\[\div \,105\,\,xy\,\,(xy+xz+yz+{{z}^{2}})\] when simplified is equal to:

A)  \[\frac{3z\,(3z+x)}{7}\]                         

B)  \[\frac{z\,(z-x)}{7}\]

C)  \[\frac{3z\,(z-x)}{7}\]                

D)  \[\frac{3z\,(z+x)}{7}\]

E)  None of these