5. Which of the following equations is not a variable separable? dy dy (b) dx ху + 3х — у —3 (a) e3r+2y %3| dx гу — 2х + 4у 8. - - dy (d) dx xy + 2y – x – 2 (c) 2ydx = (x² + 2xy + y²)dx xY – 3y + x – 3

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