7. Solve the equation (2x3 - xy2 - 2y + 3)dx- (x²y + 2x)dy = 0. x² - 6x-x²y² - 4xy = c a. b. C. d. x² - 6x + x²y² - 4xy = c 4 x² +6x+x²y² - 4xy = c x² +6x-x²y² - 4xy=c

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