Hi, I need some help with this problem:

Maximize Revenue given the following: R(x,y)=x(1000-0.1x2)+y(200-0.02y) subject to x>0, y>0, and 8x+3y<2400.

This is what I have so far but I don’t know what to do next.

Can some one help me please

▼R(x,y)=(1000-0.3x2)i+(200-0.04y)j

1000-0.3x2=0 --> x = ±√(1000/0.3)

200-0.04y=0 --> y = ±√(200/0.04)