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 //
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.