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**1. Homework Statement**

At the end of a much longer problem, I'm asked to find a second height that will satisfy a formula found for a height in the first part of the problem where:

**2. Homework Equations**

h

_{1}(h

_{2}-h

_{1})=h

_{3}(h

_{2}-h

_{3})

**3. The Attempt at a Solution**

I know the answer I should get: h

_{3}=h

_{2}-h

_{1}

But I cannot figure how to manipulate the variables to get that. I've tried using the quadratic equation but get lost under the square root sign. This has got to be easier than I'm making it!