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Question
Z-7+7xy-xyz
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Solution
(z-xyz) +(7xy-7)
=z(1-xy)+7(xy-1)
=z(1-xy)-7(-xy+1)
=z(1-xy)-7(1-xy)
=(z-7)(1-xy)
(z-xyz) +(7xy-7)
=z(1-xy)+7(xy-1)
=z(1-xy)-7(-xy+1)
=z(1-xy)-7(1-xy)
=(z-7)(1-xy)
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