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Answer :

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4A - 1 is the length of a side of a square

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Answer:

4a - 1

Step-by-step explanation:

If "x" is length of the side of a square, then A = x²

( a ± b )² = a² ± 2ab + b²

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16a² - 8a + 1 = (4a)² - 2(4a)(1) + 1² = ( 4a - 1 )² ⇒ the length of the side of the square is ( 4a - 1 )

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