b) Add : 2xy + yz -2x2
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Answer:
2xy+yz-4
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=2xy-yz+xy+3yz+4yz-xz.
=2xy +xy-yz+3yz+4yz-xz.
(adding like terms).
=3xy+ 6yz-xz.
Step-by-step explanation: ...
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