Q3 Factorise  

(V)

z-7 + 7 xy - xyz

Answers (1)

We have,
              z - 7 + 7xy - xyz = z(1 - xy) -7(1 - xy)
                                                       = (1 - xy)(z - 7)
Therefore, on factorization we get,
                                                       (1 - xy)(z - 7)

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