// Bai toan giai phuong trinh bac hai
#include
#include
#include
void main[]
{
float a, b, c, d, x1, x2;
clrscr[];
printf["\nNhap vao a: "];
scanf["%f",&a];
printf["\nNhap vao b: "];
scanf["%f",&b];
printf["\nNhap vao c: "];
scanf["%f",&c];
if[a==0]{
if[b==0]{
if[c==0]{
printf["\nPhuong trinh vo so nghiem!"];
}
else{
printf["\nPhuong trinh vo nghiem!"];
}
}
else{
printf["\nPhuong trinh co mot nghiem, x = %g",-c/b];
}
}
else{
d=b*b-4*a*c;
if[d