C语言编程中怎样用牛顿迭代法求解方程？

#include#includeint main(){float x1,x,f1,f2;static int count=0;x1=1.5//定义初始值do{x=x1;f1=x*(2*x*x-4*x+3)-6;f2=6*x*x-8*x+3;//对函数f1求导x1=x-f1/f2; count++;}while(fabs(x1-x)<=1e-5);printf("%8.7f\n",x1); printf("%d\n