... Write('-Nhap he so a= '); Readln(a); Until a <>0; Write('-Nhap he so b= '); Readln(b); Write('-Nhap he so c= '); Readln(c); delta:=b*b-4*a*c; ... Then Writeln('*Phuong trinh co 2 nghiem bang nhau X= ',-b/2*a:6:2) Else Begin x1:=(-b-sqrt(delta))/2*a; x2:=(-b+sqrt(delta))/2*a; Writeln('*Nghiem thu nhat X1= ',x1:6:2); ... Write('-Nhap mot ky tu = '); Readln(ky_tu); Write('-Nhap ho ten = '); Readln(chuoi); Write('-Nhap mot so nguyen = '); Readln(so_nguyen); Write('-Nhap...