SOLUTION
From the expression
[tex]x^2-5+2x+x^2[/tex]
combining like terms we have to bring the x-squares together, we have
[tex]\begin{gathered} x^2+x^2-5+2x \\ 2x^2-5+2x \end{gathered}[/tex]
To write in standard form, the 2x should come before the -5, so we have
[tex]2x^2+2x-5[/tex]
Hence the answer is
[tex]2x^2+2x-5[/tex]
