用c编程求二元一次方程ax^2+bx+c=0的根答:include<stdio.h> include<math.h> voidmain(){ floata,b,c,x1,x2,p,q,disc;printf("inputa,b,c\n");scanf("a=%f,b=%f,c=%f",&a,&b,&c);disc=b*b-4*a*c;if(disc<0){ printf("没根\n");} else { p=-b/(2*a);q=sqrt(disc)/(2*a);x1=p+q;x2=p-q;prin...