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Let `-2x^2+xy+10y^2-3x+30y+20 =0 `.
Use partial derivatives to calculate `(dy)/(dx)` at the point `(-2,-1)`.
(dy)/(dx)]_"(-2,-1)" =
Use partial derivatives to calculate `(dy)/(dx)` at the point `(-2,-1)`.
(dy)/(dx)]_"(-2,-1)" =
