Respuesta :

Answer:

[tex]11x^2-2x-6[/tex]

Step-by-step explanation:

[tex](4x^2+3x)+(7x^2-5x-6)= \\\\(4x^2+7x^2)+(3x-5x)-6= \\\\11x^2-2x-6[/tex]

Hope this helps!