If (p + 2 ) (2q – 1) = 2pq – 10 and (p

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If (p + 2 ) (2q – 1) = 2pq – 10 and (p – 2) (2q – 1) = 2 pq – 10, then what is pq equal to?

[CDS II 2020 Mathematics Past paper]

–10

–5