Respuesta :

mallikabatra

Answer:

[tex]7x^2-2x-3[/tex]

Step-by-step explanation:

First get rid of the parenthesis

[tex]5x^2-x-7+2x^2+3x+4[/tex]

Next simplify the variables

[tex]7x^2-x-7+3x+4[/tex]

[tex]7x^2-2x-7+4[/tex]

[tex]7x^2-2x-3[/tex]