A) \[(p+q+r)\,(p+q-r)\]\[(p-q+r)\,(p-q-r)\]
B) \[(p-q-r)\,({{p}^{2}}-{{q}^{2}}-{{r}^{2}})\]
C) \[(p-q-r)\] \[(2p-2q-2r)\]
D) \[(p+q-r)\,({{p}^{2}}-{{q}^{2}}-{{r}^{2}})\]
Correct Answer: A
Solution :
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