factorize the expression z-7+7xy-xyz
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Z-7+7xy-zyz
Z-7-xyz+7xy. ( rearrange the last two terms)
1(z-7)-xy(z-7)
(z-7) (1-xy)
Z-7-xyz+7xy. ( rearrange the last two terms)
1(z-7)-xy(z-7)
(z-7) (1-xy)
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