AboutAlon Mandes Expertise Kind of questions I can answer : Limits, Derivatives, Integration, Implicit functions, continuousity, differentiation ,Extremum problems, Lagrange multipliers, Gradients, Surface integrals, Multi variables functions ,Multi variables Integrals,Complex variables ,Complex functions, Curves, Trajectory integrals & Vector analyse,Divergence,Rotor & word problems.
Kind of question I can't answer : Economics,Combinatorics,infinite series & convergence ,Statistics & Probabilities .
Experience 1. I'm a team member of mathnerds (math site for answering questions)
2. I'm a team member in the Student's Union of the Technion, helping
students who have problems in mathematics.
3. 2 years of experience as a math teacher in college.
4. I give free homework help for high school students in
Mathematics & Physics.
5. I teach part time in collage the subjects : "Digital Signal Processing" , "Random Signals & Noise" ,
"Complex Functions".
Answer Hi Ashlee , this is a quadratic equation. Let's change a little
bit how its written : h=1/2gt^2 + v0t = 0.5gt^2+vot-h
The quadratic equation has 2 solutions :
-vo+sqrt[vo^2-4*0.5*(-h)] -vo+sqrt[vo^2+2h]
t1= -------------------------- = ------------------
2*0.5g g
-vo-sqrt[vo^2-4*0.5*(-h)] -vo-sqrt[vo^2+2h]
t2= -------------------------- = ------------------
2*0.5g g
Usually one solution of the two , is not physically valid, for instance negative value. So we disqualify it & take the other
one as 'the' solution
