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2y dy/dx - y²/x = -x ..............faktor integral = e^∫(-1/x) dx
= e^(-ln x)
= 1/x
y².(1/x) = ∫ -x.(1/x) dx
y²/x = -x + c₁
y² = c₁.x - x²
y = √(c₁.x - x²) atau y = -√(c₁.x - x²)