0 = - 9.81/2 t^2 + 2 subtract 2 from each side
-2 = - 9.81/2 t^2 multiply both sides by 2
-4 = -9.81t^2 divide both sides by -9.81
0.4077471967380224 = t^2 since this looks like a Physics formula where you want a positive result for t, take the positve root of each side
0.638550856814100908 = t
0 = - 9.81/2 t^2 + 2 subtract 2 from each side
-2 = - 9.81/2 t^2 multiply both sides by 2
-4 = -9.81t^2 divide both sides by -9.81
0.4077471967380224 = t^2 since this looks like a Physics formula where you want a positive result for t, take the positve root of each side
0.638550856814100908 = t