f(x,y)= 3x5y2 - 30x3y2 + 60xy2 +150
How do I find the critical points where this equation equals zero?
The Attempt at a Solution
I found the partial derivatives, but I'm stuck now and don't know where to go from here.
dx = 15x4y2 - 90x2y2 + 60y2
dy = 6x5 - 60x3y + 10xy + 240