Respuesta :

To expand the expression: (2f-1) to the second power

[tex]\begin{gathered} (2f-1)^2=(2f-1)(2f-1) \\ =2f(2f-1)-1(2f-1) \\ =4f^2-2f-2f+1 \\ =4f^2-4f+1 \end{gathered}[/tex]

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