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Factorize ` 1+x+y-z+xy-yz-zx-xyz` |
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Answer» We have ` 1+x+y-z+xy-yz-zx-xyz` `=(1+x+y-z+xy-yz-zx-xyz` `=(1+x)+y(1+x)-z(1+x)-yz(1+x)` ` = (1+x(1+y-z-yz)` `= 91+x)xx [(1+xy)-z(1+y)]` `(1+x)(1+y(1-z)`. |
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