I am completely stuck on this one...
Let z(x,y) = 3xy^2 - 2y + 5x^2y^2
the last term should read "5 x sq y sq"
Which of the following is equal to a^z/ax^2?
my options are
10y^2
(3y^2 + 10xy^2)^2
6y + 20xy
3y^2 + 10xy^2
6x + 10x^2
one of these is right, but i'm not sure which, or how...any help would be great!