Answer:
[tex]6y^2+12y[/tex]
Step-by-step explanation:
[tex]\left(5y^2+y+6\right)+\left(y^2+11y-6\right)[/tex]
remove parentheses
[tex]\left5y^2+y+6\right+\lefty^2+11y-6\right\\[/tex]
add like terms
[tex]6y^2+12y+6-6\\[/tex]
simplify
[tex]6y^2+12y[/tex]
