👉 In mathematics, a "grandfilial" is an algebraic number that satisfies the equation $x^2 - 1 = 0$. This means that it's a solution to the quadratic equation $x^2 - x - 1 = 0$, which can be factored into $(x-1)(x+1) = 0$. Grandfilial numbers are important in number theory and algebraic geometry, as they form a special class of solutions to certain polynomial equations
