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I don't know how to find the radius and center or graph the circle!
I am really bad at math and am taking it in summer school now. I need this take home test bad but I don't know how to do these 2 questions. Please help.
1. x^2+y^2-4x+4y-28=0 Graph the circle. 2. x^2+y^2+2x-8y-79=0 Find the radius and center of the circle. Can someone... ANYONE please help me. |
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Have you learned how to complete the square?
#1: Group terms: complete the square Now factor, and you can see its center and radius. The radius is the square root of the number to the right of the equals sign. |
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Did we miss the part about it being a take-home test? |
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