Respuesta :
[tex]( {2x})^{2} - x + 1 = [/tex]
[tex]4 {x}^{2} - x + 1 = [/tex]
[tex]4 ({ - 2})^{2} - ( - 2) + 1 = [/tex]
[tex]4 \times 4 + 4 + 1 = [/tex]
[tex]16 + 4 + 1 = [/tex]
[tex]21[/tex]
[tex]( {2x})^{2} - x + 1 = [/tex]
[tex]4 {x}^{2} - x + 1 = [/tex]
[tex]4 ({ - 2})^{2} - ( - 2) + 1 = [/tex]
[tex]4 \times 4 + 4 + 1 = [/tex]
[tex]16 + 4 + 1 = [/tex]
[tex]21[/tex]