please solve for U as soon as possible.

Answer:
u = the square root of ([tex]v^{2} - 2 as[/tex])
Step-by-step explanation:
I could not figure out how to get [tex]v^{2} - 2as[/tex] under the square root symbol so I typed it out in the answer. To solve for u, we subtract 2as from both sudes and then take the square root of both sides. Hope this helps!