i've tried it but lets assume that i was to enter these values a=2, b=0 and c=2 .... as per question i am suppoed to get the value of x as x=1.41421356237.... or x =-1.41421....... i tried it but it dosent really come out.. i guess i'm messing something up somewhere.. any way i've been on this for 3 hours now.. got to catch some would be here early in the morning to see the progress.. Anyway thanks guys.. atleas one em bothered to click.. lol