20. In question number 19, what is its particular solution? * 1 point (D2 - D - 2)y = 1-2x -9e- Up = 3e *+x-2 Up = 3xe *+x-1 Option 1 Option 2 Up = 3e - 2x - 2 Up = 3xe - 2x -1 Option 3 Option 47. For what function M(x.y) will the following differential equation be exact * 1 point M(x, y)da + (x' + x)dy = 0 2xy - y 2x y - 2y Option 1 Option 2 2xy + y 2x y + 2y Option 3 Option 4