For ichidan verbs, potential form is made by changing the ru to rareru. The same is done to change them to passive.

e.g taberu -> taberareru (can eat; also, be eaten)

For yodan verbs, potential is made by ending with eru and passive by areru.

e.g korosu -> koroseru (can kill)
korosu -> korosareru (be killed)

Now how does one make a potential passive i.e "can be eaten" or "can be killed"?

For ichidan verbs, potential form is made by changing the ru to rareru. The same is done to change them to passive.

e.g taberu -> taberareru (can eat; also, be eaten)

For godan verbs, potential is made by ending with eru and passive by areru.

e.g korosu -> koroseru (can kill)
korosu -> korosareru (be killed)

Now how does one make a potential passive i.e "can be eaten" or "can be killed"?

For ichidan verbs, potential form is made by changing the ru to rareru. The same is done to change them to passive.

e.g taberu -> taberareru (can eat; also, be eaten)

For yodan verbs, potential is made by ending with eru and potential by areru.

e.g korosu -> koroseru (can kill) korosu -> korosareru (be killed)

Now how does one make a potential passive i.e "can be eaten" or "can be killed"?

For ichidan verbs, potential form is made by changing the ru to rareru. The same is done to change them to passive.

e.g taberu -> taberareru (can eat; also, be eaten)

For yodan verbs, potential is made by ending with eru and passive by areru.

e.g korosu -> koroseru (can kill) 
korosu -> korosareru (be killed)

Now how does one make a potential passive i.e "can be eaten" or "can be killed"?