Hi;

I have make u the subject of v^2 = u^2 + 2as.

The solution is u = sqrt(v^2 - 2as).

the last opporation is take sqrt of both sides so I need parenthesis because the

last opporation is sqrt.

but in another example I have a solution of sqrt 2(s-v)/a.

why dont I need parenthesis around the fraction.

Thanks.