(4p^2q^2)*(p^2-q^2)*(4q^2+q^2)
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Step-by-step explanation:
(P^2+q^2-r^2)^2 - 4p^2q^2
=(p^2+q^2-r^2)^2 - (2pq)^2
=(p^2+q^2-r^2+2pq)(p^2+q^2-r^2–2pq)
=(p^2+q^2+2pq-r^2)(p^2+q^2–2pq-r^2)
={(p+q)^2 - r^2}{(p-q)^2 - r^2}
=(p+q+r)(p+q-r)(p-q+r)(p-q-r)
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