my problem says find the center & radius os a circle x^2+6x+y^2-4y+4=0 whats the formula i sold my book and im reviewing for my finals help please
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Equations of circles are in the form of: where (a, b) represents your centre of the circle (note the negative signs) and r (not ) represents your radius. For forms such as your question, you complete the square in respect to each variable:
Originally Posted by bharriga whats the formula i sold my book and im reviewing for my finals help please bad move...hopefully you don't do this next time. Sell them after your finals!
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