Find the value of k so that the given differential equation is exact. (³+kxy-2x) dx + (3xy² + 20x²y³) dy=0. Then find the implicit solution. O 10: xy³ +5x²y4_x²=C O-10x²y³ + x²y + x² = C O - xy3 -5x2y+x=C O xy²-3xy + x² = C

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