Solve 4x square minus 4x plus 1 by completing square method
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answer is( 2x-1 )(2x-1)
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= (4x)² - 4x + 1
= 16x² - 4x + 1
= 4x(4x - 1 + 1)
= 16x²
= 16x² - 4x + 1
= 4x(4x - 1 + 1)
= 16x²
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