[tex]Hello[/tex] [tex]There![/tex]
The answer is...
[tex]3x^2+x[/tex]
HERE'S A EXPLANATION!
[tex]2x^2-4x+1+5x+x^2-1[/tex]
[tex]=2x^2+-4x+1+5x+x^2+-1[/tex]
Combine these like terms!
[tex]=2x^2+-4x+1+5x+x^2+-1[/tex]
[tex]=(2x^2+x^2)+(-4x+5x)+(1+-1)[/tex]
[tex]=3x^2+x[/tex]
ANSWER!
[tex]=3x^2+x[/tex]
Hopefully, this helps you!!
[tex]AnimeVines[/tex]