What. is the antonym of uninformed fool

Consider the quadratic equation ax^2+bx+5=0,where a, b and c are rational numbers and the quadratic has two distinct zeros.if one zero is irrational what is the other zero?

Why might the author have included the detail about father paul picking up the magazine? 1. it illustrates the constant conflict father paul faces in trying to communicate with leon.2. it establishes father paul as a well-read intellectual.3. it suggests that similar missionary work was causing conflict in other places as well.4. it shows that he was trying to remind himself that he did not agree with the people’s beliefs.(it's 3 )

The excerpt above is from page 21 of harry potter and the sorcerers stone by j.k rowling. which passage represents a