Complex numbers and FTA

A complex number is a number that can be shone as a+bi. FTA states that every non-consistent single-variable polynomial with a complex coefficient has at least one complex root and if complex numbers didn't exist then it would not be a saying. https://www.desmos.com/calculator/nk6ebkzo86 1x^2+0x+0 This show how the discriminant related to FTA.