Student Support Forum: 'Solving quadratic equation' topicStudent Support Forum > General > "Solving quadratic equation"

 Next Comment > Help | Reply To Topic
 Author Comment/Response matt 02/02/13 3:19pm I need to solve a quadratic equation of A t2 + B t + c = 0 (finding the value of t when the equation is equal to zero) A and c is a constant while B is a long list of number. Is there a way to solve the equation and pick out only the positive value? Because t stands for time and I don't want the negative value. I've tried time = ( yVelocity PlusMinus[Sqrt[(-yVelocity)^2 - (4*4.902*(-2.7))]])/9.81 // N which is the solution of the quadratic equation using the quadratic formula. I end up with a long list of number but couldn't manage to pick out only the positive number. Help is very much appreciated. Thanks very much. URL: ,

 Subject (listing for 'Solving quadratic equation') Author Date Posted Solving quadratic equation matt 02/02/13 3:19pm Re: Solving quadratic equation Bill Simpson 02/02/13 11:41pm Re: Solving quadratic equation yehuda 02/03/13 03:23am
 Next Comment > Help | Reply To Topic