It is correct to prove that a2/b+b2/c+c2/a is greater than or equal to 1, but if you simplify the energy of the molecule, you will find that you can work out an a+b+c, which can be directly proved. If I were a judge, I might give you 30% points, but it varies from person to person. Some examiners, such as graduate students, don't look at your process if they think your answer is wrong. If you meet a high school teacher who knows how hard students work, he will judge them carefully. It is reasonable to give points.