The roots of the equation \[{{x}^{4}}-4{{x}^{3}}+6{{x}^{2}}-4x+1=0\] are [MP PET 1986]

The roots of the equation \[{{x}^{4}}-4{{x}^{3}}+6{{x}^{2}}-4x+1=0\] a

1.	The roots of the equation \[{{x}^{4}}-4{{x}^{3}}+6{{x}^{2}}-4x+1=0\] are [MP PET 1986]
A.	1, 1, 1, 1
B.	2, 2, 2, 2
C.	3, 1, 3, 1
D.	1, 2, 1, 2
Answer» B. 2, 2, 2, 2

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The roots of the equation \[{{x}^{4}}-4{{x}^{3}}+6{{x}^{2}}-4x+1=0\] are [MP PET 1986]

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