Hitung dy/dx dari x²y + xy² = 6

x²y + xy² = 6
2xy + x² dy/dx + y² + 2xy dy/dx = 0
x² dy/dx + 2xy dy/dx = -2xy - y²
dy/dx (x² + 2xy) = -2xy - y²
dy/dx = -(2xy+y²)/x² + 2xy

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