Question

qx+py=2pq
px-qy=p^2-q^2​

Answer 1

==> qx + py = 2 pq

==> pqxy = 2 pq

==> 2p^2q^2xy

==> px - qy = p^2-q^2

==> -pqxy = p ^ 2 - q^2

==> p^3q^3xy

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