[Solved] If one of the lines given by the equation 2x^{2} + axy + 3y^{2} = 0 coincides with one of those given by 2x^{2} + bxy — 3𝑦^{2} = 0, and the other lines represented by them are perpendicular then a^{2} + b^{2} is . - - IPM Indore 2021