Math Chapter Wise Ordinary And Partial Differential Equations, Integral Equations And Calculus Of Variations English MCQ PGT 2000 Q.The value of M y ∂ and N x ∂ from (x2 –2xy+3y2) dx +(4y3 +6xy-x2) dy = 6 is A–2x+6y and 6y–2x B8y+7 and 9x+8 C–2x+7y and 9x+8 DNone of these Show answer Correct answer: –2x+6y and 6y–2x