Respuesta :

2y - 3x^2 + 6x^2 - 3y
Bring like terms together:-
6x^2 - 3x^2 + 2y - 3y
= 3x^2 - y   <-----  Answer

irspow
2y-3x^2+6x^2-3y  combine like terms

3x^2-y