solve this question with steps. no.2
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4a²-4b²+4a+1,
4a²+1+4a-4b²,
(2a)²+(1)²+2×2a×1 - (2b)²,
(2a+1)² - (2b)²,
(2a+1+2b) (2a+1-2b)
4a²+1+4a-4b²,
(2a)²+(1)²+2×2a×1 - (2b)²,
(2a+1)² - (2b)²,
(2a+1+2b) (2a+1-2b)
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