# Well, I Guess That Works

Geometry Level 3

I'm trying to do a calculation with positive numbers $$a$$ and $$b.$$ All I have is a graph of $$y=x^2$$ and some string. I connect the points where $$x=a$$ and $$x=-b,$$ and see where my string touches the $$y$$-axis for my result!

What calculation am I doing?

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