what should be added to 3xy- 4yz+ 4zz to get zy 3yz-2zx+7 to get Xy+ 3yz- 2zz +7
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2
Answer:
3yz-2zz7-(xy+3yz-2zz-7)
=-xy
Answered by
2
CaseI
Let the no be X
3xy-4yz+4zz+X = zy+3yz-2zx+7
X = zy+3yz-2zx+7-(3xy-4yz+4zz)
X = zy+3yz-2zx+7-3xy+4yz-4zz
X = zy+3yz+4yz-2zx+7-3xy-4zz
X = zy+7yz-2zx+7-3xy-4zz
Case II
X = zy+7yz-2zx+7-3xy-4zz = xy+3yz-2zz+7
zy+7yz-2zx+7-3xy-4zz = xy+3yz-2zz+7
= xy+3yz-2zz+7-(zy+7yz-2zx+7-3xy-4zz)
= xy+3yz-2zz+7-zy-7yz+2zx-7+3xy+4zz
= xy+3xy+3yz-7yz-2zz+4zz+7-7+zy+2zx
= 4xy-4yz+2zz+zy+2zx. ANS
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