it's necessary to try
'hay que' is impersonal (no specific subject). Followed by infinitive.
I don't know if it will work, but it's worth trying.
—Do you think there is a solution? —I do not know, but we have to try.
Even if it seems hard, it has to be tried at least once.
I don't know if it will work, but it's worth trying.
—Do you think there is a solution? —I do not know, but we have to try.
Even if it seems hard, it has to be tried at least once.