Question

split the middle term 4x2-4x+1
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Answer 1

$4 {x}^{2} - 2x - 2x + 1$

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Answer 2

Answer:

4x^2-4x+1

=4x^2-2x-2x+1

=2x(2x-1)-1(2x-1)

=(2x-1)(2x-1)

=(2x-1)^2