Question: what is a real number that is irrational

title: Irrational number
text: p ( x ) = a n x n + a n − 1 x n − 1 + ⋯ + a 1 x + a 0 = 0 ( \ displaystyle p ( x ) = a_ ( n ) x ^ ( n ) + a_ ( n - 1 ) x ^ ( n - 1 ) + \ cdots + a_ ( 1 ) x + a_ ( 0 ) = 0 )