loveinharovrd
Newbie level 4
(px-y)(py+x)=2p where p=y' (Hint:let z=y^2)
answer: (c^2+2c)x^3-xy^2(2c+4)-4cx=0
answer: (c^2+2c)x^3-xy^2(2c+4)-4cx=0
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