(4p +7q)² - 112pq = (4p - 7q)²
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Step-by-step explanation:
--> (4p+7q)²-112pq = (4p - 7q)²
--> 16p²+56pq+49q²-112pq = 16p²-56pq+49q²
--> 56pq+56pq-112pq = 0
-->112pq-112pq = 0
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