First, we multiply both expressions:
[tex](2x-7)(2x-7)=2x\cdot2x-7\cdot2x-2x\cdot7+7\cdot7.[/tex]Now, we simplify:
[tex]\begin{gathered} 2x\cdot2x-7\cdot2x-2x\cdot7+7\cdot7=4x^2-2(7\cdot2x)+49 \\ =4x^2-28x+49. \end{gathered}[/tex]Answer:
[tex]4x^2-28x+49.[/tex]