C++编写程序用牛顿迭代法求一元方程5x^3?3x^2+2x?8=0 在x=1.1附近的根要求的精

#include "iostream"#include "math.h"using namespace std;typedef double (*func) (double);double y(double x){ return ((5*x-3)*x+2)*x-8;}double dy(double x) { return (15*x-6)*x+2;}double newton(double x, func fy, func fdy) { doub