fn sub(a: &[FieldElement<F>; 2], b: &[FieldElement<F>; 2]) -> [FieldElement<F>; 2] {
        [&a[0] - &b[0], &a[1] - &b[1]]
    }
Returns the component wise subtraction of `a` and `b`
crates/math/src/field/extensions/quadratic.rs