InterviewSolution
<P>`(p+Q)^(2)=p^(2)+2pq+q^(2)``(p^(2)+q^(2))=p^(2) +2pq+q^(2)``(p+q)=p^(2)+4pq+q^(2)``2(p+q) =2p+4pq+2q`
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