Respuesta :

gmany

Answer:

[tex]\huge\boxed{5x^2-2x}[/tex]

Step-by-step explanation:

[tex]3x+6x^2-5x-x^2\qquad|\text{combine like terms}\\\\=(6x^2-x^2)+(3x-5x)\\\\=5x^2-2x[/tex]

crystaljordan727
number 3 is the answer sjsjsjsj