The square root of \[{{\mathbf{(ab+ac-bc)}}^{\mathbf{2}}}\mathbf{-4abc

1.	The square root of \[{{\mathbf{(ab+ac-bc)}}^{\mathbf{2}}}\mathbf{-4abc(a-b)}\]is ________
A.	\[(bc+ca-ab)\]
B.	\[(ab+bc-ca)\]
C.	\[(ab+bc+ca)\]
D.	\[(ab-bc+ca)\]
E.	None of these
Answer» C. \[(ab+bc+ca)\]

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The square root of \[{{\mathbf{(ab+ac-bc)}}^{\mathbf{2}}}\mathbf{-4abc(a-b)}\]is ________

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