A) \[{{A}^{2}}-AB-BA+{{B}^{2}}\]
B) \[{{A}^{2}}-2AB+{{B}^{2}}\]
C) \[{{A}^{2}}-2BA+{{B}^{2}}\]
D) \[{{A}^{2}}-{{B}^{2}}\]
E) \[{{A}^{2}}+{{B}^{2}}\]
Correct Answer: A
Solution :
\[{{(A-B)}^{2}}={{A}^{2}}-AB-BA+{{B}^{2}}\]
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