Answer:
Adding the expressions gives;
[tex]-2m^2+6m+8[/tex]Explanation:
Given the expression;
[tex](-2m^2-2m+1)+(8m+7)[/tex]We want to add the expressions;
[tex]\begin{gathered} -2m^2-2m+1+8m+7 \\ \text{rearranging and simplifying;} \\ -2m^2-2m+8m+1+7 \\ -2m^2+6m+8 \end{gathered}[/tex]Therefore, adding the expressions gives;
[tex]-2m^2+6m+8[/tex]