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Question

State True or False.
27x3+y3+z39xyz = (3x+y+z)[(9x2+y2+z23xyyz3zx)]

A
True
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B
False
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Solution

The correct option is A True
We have, 27x3+y3+z39xyz=(3x)3+(y)3+(z)33(3x)(y)(z)
=(3x+y+z)[(3x)2+y2+z2(3x)yyzz(3x)]
=(3x+y+z)[(9x2+y2+z23xyyz3zx)]

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