Solve for "t": x = vt - (1/2)at^2

[Guest]

I'm stuck. I am supposed to solve for t and the original equation is:
x = vt - (1/2)at^2

Here is what I have done so far.

2x = 2vt - at^2
2x = t(2v - at)
t = 2x/(2v - at)

But since I am supposed to solve for t how do I get the other t out or am I done?

Thanks!!
Andrea

 

[minestrone]

hey again,

here is my approach to solving this

from here: 2x=2vt-at^2

at^2 - 2vt - 2x = 0

then use the quadratic formula

where a=a, b=-2v and c=2x

hopefully you can work it out from here

t = -(-2v) +- ............
---------------------
2a