If the roots of the equation \[{{x}^{3}}-12{{x}^{2}}+39x-28=0\] are in – McqOptions

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1.	If the roots of the equation \[{{x}^{3}}-12{{x}^{2}}+39x-28=0\] are in A.P., then their common difference will be [UPSEAT 1994, 99, 2001; RPET 2001]
A.	\[\pm 1\]
B.	\[\pm 2\]
C.	\[\pm 3\]
D.	\[\pm 4\]
Answer» D. \[\pm 4\]

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