Answer:
(5n + 4p)(5n + 4p)
Explanation:
25n^2 + 40np + 16p^2
(5n)^2 + 2(5n)(2^2 * p) + (2^2 * p)^2
(5n + 2^2 * p)^2
(5n + 4p)^2 > (5n + 4p)(5n + 4p)
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