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Question
Factorize each of the following expression:
p2q2 − p4q4
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Solution
\[p^2 q^2 - p^4 q^4 \]
\[ = p^2 q^2 (1 - p^2 q^2 )\]
\[ = p^2 q^2 [1 - (pq )^2 ]\]
\[ = p^2 q^2 (1 - pq)(1 + pq)\]
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