... GIAO TRINH LY THUYET VA BAI TAP TURBO PASCAL -CHUONG 1 Dang Thanh Tuan(15/3/2004) **********0101********** Program PTB2; Var a,b,c:Integer; delta,x1,x2:Real; Begin ... vo nghiem& apos;) Else If delta = 0 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 ... ',so1,' va ',so2,' = ',tong); Writeln('*Hieu cua hai so ',so1,' va ',so2,' = ',hieu); Writeln('*Tich cua hai so ',so1,' va ',so2,'...