bool isWithinRange(double y) override {
        if (a == 0) {//liniowa
            if (b == 0) {
                return y == this->c;
            } else {
                double x = (y - this->c) / this->b;
                return isWithinDomain(x);
            }
        } else { //kwadratowa
            double p = -b / (2 * a);
            double delta = b * b - 4 * a * c;
            double q = -delta / (4 * a);
            double x = sqrt((y - q) / a) + p;
            if( isWithinDomain(x) == 1){
                return (a*(x-p)*(x-p)+q) == (a*x*x+b*x+c);
            }
        }
    };