#include <stdio.h> #include <math.h> int main() { float a, b, c; int temp; while ((temp = scanf("%f %f %f", &a, &b, &c)) != -1) { float delta = b * b - 4 * a * c; if (a == 0) { printf("Not quadratic equation\n"); } else if(delta == 0) { printf("x1=x2=%.2f\n", - b / (2*a)+0); ...