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anonymous
 one year ago
HELP:
What is the general form of the equation for the given circle?
x2 + y2 − 8x − 8y + 23 = 0
x2 + y2 − 8x − 8y + 32 = 0
x2 + y2 − 4x − 4y + 23 = 0
x2 + y2 + 4x + 4y + 9 = 0
anonymous
 one year ago
HELP: What is the general form of the equation for the given circle? x2 + y2 − 8x − 8y + 23 = 0 x2 + y2 − 8x − 8y + 32 = 0 x2 + y2 − 4x − 4y + 23 = 0 x2 + y2 + 4x + 4y + 9 = 0

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0http://cdn.ple.platoweb.com/PCAPASSETSPROD/03974c930e3e47c78f1614a92ab2c070

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1you could do this by plugging in the given values of x and y which are on the circle and see which option fits

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1for example try point A = (4,7) on first option left side of the equation = 4^2 + 7^2  8(4)  8(7) + 23 = 0 so that satisfies the equation but now we have to try the other point (7,4) if that gives 0 then we have the correct equation

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1what does 7^2 + 4^2  8(7)  8(4) + 23 work out to?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1 compare it with my first post...

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1does that work out to zero?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes your right if u plug in the other point (7,4) u get 0 as your final answer

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1yes you do so that is the required equation because it satisfies the 2 points (4,7) and (7,4)

welshfella
 one year ago
Best ResponseYou've already chosen the best response.1first option is the one

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and your right thanks for the help!
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