If a polynomial function f(x) has roots 0, 4, and 3 + square root 11 , what must also be a root of f(x)?

3-√11
This function is evidently a quartic - a function with 4 roots. The last root has been found using the quadratic formula however, the answer always comes in pairs because the formula is
{b+√(b^2 - 4ac)}/2a and {b-√(b^2 - 4ac)}/2a. Therefore the other root must be 3-√11

11/2.2 = 5 inches for the length 8.5/2.2= 3.86 inches for the width

Letter b sorry i’m i’m wrong xx