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Precalculus
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OpenStudy (anonymous):
Pre-Cal! a)9y^2-x^2+36y+6x+18=0 b)x^2+9y^2-4x-72y+139=0 find the: center, vertices, foci, main axis. How would I go about solving this? Can anyone help and explain how what to do? Im not sure what I'm doing and OS is my last hope! D:
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OpenStudy (anonymous):
http://braingtest.ck12.org/skills/107052/learn Just watch the video and you can solve it yourselves
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