Question

1+x+y-z+xy-yz-xz-xyz factorise

Answer 1

x)+y(1+x)+z(1+x)+yz(1+x)= 
(1+x)(1+y+z+yz)= 
(1+x)[1+y+z(1+y)]= 
(1+x)(1+y)(1+z).end...

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Answer 2

=1(1+x+y)-z(1+x+y)+xy(1-z)

=[(1+x+y)](1-z)+xy(1-z)

=[1+x+y]1(1-z)+xy(1-z)

=(1+x+y)(1-z)(1+xy)

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