find dy/dx , if yx+xy+xx=ab
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Differentiate both lhs and rhs wrt x.
y + xdy/dx + xdy/dx + y + 2x = 0
2(y+x) + 2(xdy/dx) = 0
dy/dx = - (x+y)/x
y + xdy/dx + xdy/dx + y + 2x = 0
2(y+x) + 2(xdy/dx) = 0
dy/dx = - (x+y)/x
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