Thank you for the opportunity to help you with your question!

1) 0/x=0..........When 0 is in the numerator, it's 0

2) x/0=the expression has no meaning, as there is no number which, multiplied by 0, gives a (assuming a≠0), and so division by zero is undefined. Since any number multiplied by zero is zero

Please let me know if you need any clarification. I'm always happy to answer your questions.