Given $\displaystyle f(x,y)=\frac{6x^2+13xy+5y^2}{2x+y}$

a) Find the domain of f.

b) How can it be defined at all points not in its domain so the resulting

function is continuous everywhere in the xy-plane?

a) its domain is the whole xy plane expept for the line y=-2x.

b) I really have no clue how to approach this. Can somebody help??