Can anyone isolate a from this equation: (x-a)^2 = x^2 + y^2 thanks. I get as far as a = y^2/a-2x, but don't know where to go fro there.
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I can $\displaystyle (x-a)^2 = x^2 + y^2$ $\displaystyle x-a = \sqrt{x^2 + y^2}$ $\displaystyle -a = \sqrt{x^2 + y^2}-x$ $\displaystyle a =x- \sqrt{x^2 + y^2}$
Thanks, it was suprisingly simple, I was just starting from the wrong place. Thanks again! EDIT: I've stumpled upon another algebretic type problem, using the above value for a is it possible to prove that (y/-a)^2 = -1? I'm stumped.
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