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