Giải hệ - c

//Chuong trinh giai he phuong trinh bac nhat 2 an //File he_phuong_trinh_b1.c #include #include int main() { float a1,b1,c1,a2,b2,c2; double d,dx,dy,x,y; printf (" Giai he phuong trinh bac nhat 2 an \n"); printf (" A1X+B1Y=C1\n"); printf (" A2X+B2Y=C2\n"); printf(" Nhap cac he so \n"); printf("A1= "); scanf("%f", &a1); printf("\a\n"); printf("B1= "); scanf("%f", &b1); printf("\a\n"); printf("C1= "); scanf("%f", &c1); printf("\a\n"); printf("A2= "); scanf("%f", &a2); printf("\a\n"); printf("B2= "); scanf("%f", &b2); printf("\a\n"); printf("C2= "); scanf("%f", &c2); printf("\a\n"); d=a1*b2-a2*b1; dx=c1*b2-c2*b1; dy=a1*c2-a2*1; if (d) { x=dx/d; y=dy/d; printf(" He phuong trinh co nghiem duy nhat (x,y)=(%.2f,%.2f)",x,y); } else if (dx) printf(" he phuong trinh vo nghiem"); else printf (" He phuong trinh co vo so nghiem"); getch(); return 1; }