a2 -2ab +b2
(a+b)(a-b)
(a-b)2+ 4ab
(a+b)2 - 4ab
Source: বাংলাদেশ নির্বাচন কমিশন - অফিস সহায়ক (31-03-2023)
Answer: (a-b)2+ 4ab
Explanation:
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