The formula gives the maximum height y of a projectile launched straight up, given acceleration a and initial velocity v.
(choices in photo)

We have the following expression:
 y = (v ^ 2) / (2 * a)
 We must clear v from the equation.
 For this, we follow the following steps:
 Step 1)
 Pass 2 * a to multiply:
 2 * a * y = v ^ 2
 Step 2)
 Square root on both sides:
 root (2 * a * y) = v
 Step 3)
 Rewrite expression:
 v = root (2 * a * y)
 
 v = root (2 * a * y)
 (option 1)

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