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1) (3xy+2yz-3xz) and(2xy-5yz-2zx)
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Step-by-step explanation:
(3xy+2yz-3xz)+(2xy-5yz-2zx)
=3xy+2yz-3xz+2xy-5yz-2zx
=3xy+2xy +2yz-5yz-3xz-2xz
=5xy-3yz-5xz
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