Find dx2 in terms of x and y given 3 xy + 1 = 7. -3y-7 a) O dx2 2y+3 x b) O -3y+2x+7 dx- 3 x () O d' y 54 xy+ 18 y' + 126 x - 98 dx2 (2)+3 x)3 d) O d' y -3y dx2 2y+3 x d' y e) O 54 xy + 18 y dx2 (2 y + 3x)