A) \[\frac{1}{2}({{\left| \alpha +\beta \right|}^{2}}-{{\left| \alpha -\beta \right|}^{2}})\]
B) \[\frac{1}{2}({{\left| \alpha +\beta \right|}^{2}}+{{\left| \alpha -\beta \right|}^{2}})\]
C) \[{{\left| \alpha +\beta \right|}^{2}}+{{\left| \alpha -\beta \right|}^{2}}\]
D) None of these
Correct Answer: B
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