using a suitable identify multiply (2a -1/4) ( 2a - 1/4)
please please please please please please answer its very urgent
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(2a-1/4)(2a-1/4)
=(2a-1/4)² [(a-b)²=a²+b²-2ab ]
=4a²+1/16-2×2a×1/4
=4a²+1/16-a
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