Find (dy)/(dx) by implicit differentiation. x² + 3xy + y² = 11. (dy)/(dx) =
a) (2x + 3y) / (x + 3)
b) (2x + 3y) / (x - 3)
c) (2x - 3y) / (x + 3)
d) (2x - 3y) / (x - 3)