clear; clc;

C1 = [48100, 54800, 36200, -123400];
r1 = roots(C1);
IRR1 = 1 / r1(end) - 1

C2 = [139100, 0, 0, -123400];
r2 = roots(C2);
IRR2 = 1 / r2(end) - 1
