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## Homework Statement

1. How did they complete the square for these equations in the picture below? What was their thought process?

2. distance/velocity = time , velocity/acceleration = time , In leibniz notation how does this cancel out?

When you divide, how does it cancel out to give you a time unit?

## Homework Equations

1. In picture

2. ds/dt / d

^{2}s / dt

^{2}

## The Attempt at a Solution

1. It seems like it came out of thin air.

2. dt/ds = time?