Respuesta :

gmany

Answer:

A. 2x² + 5x + 1

Step-by-step explanation:

[tex]7x^2-6+4x+7-5x^2+x\qquad\text{combine like terms}\\\\=(7x^2-5x^2)+(4x+x)+(-6+7)\\\\=2x^2+5x+1[/tex]