c语言编程,求方程2X^2+3X-3=0 的根答:include <stdio.h> include <math.h> int main ( ){ double a,b,c,disc,x1,x2,p,q;//scanf("%lf%lf%lf",&a,&b,&c);a=2.0;b=3.0;c=-3.0;disc=b*b-4*a*c;if (disc<0)printf("has not real roots\n");else { p=-b/(2.0*a);q=sqrt(disc)/(2.0*a);...