Question

Factorise z-19+19xy-xyz

Answer 1

Soln:-

z-19+19xy-xyz

=z-xyz-19+19xy

=z(1-xy)-19(1-xy)

=(1-xy)(z-19).

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Answer 2

Answer:

Step-by-step explanation:

(z-xyz) (-19+19xy)

z(1-xy)-19(1-xy)

(1-xy) (z-19)