Question

D = L ( m/k + v^2/25)

Make v the subject of the formula.

Answer 1

D/L = m/k + v^2/25
-m/k -m/k
25(D/L - m/k) = v^2/25(25)
Sqrt 25(D/L - m/k) = sqrt v^2
Sqrt 25(D/L - m/k) = v

Answer 2

Answer and steps in picture.