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kompoz [17]
3 years ago
5

Find the center of the circle whose equation is x² - 10x + y² - 10y = -1 A)(5,5) B)(10,10) C)(10,1)

Mathematics
1 answer:
Tcecarenko [31]3 years ago
3 0
You need to complete the square and then flip the signs and you'll have your answer:

(x - 5)² - 25 + (y - 5)² - 25 = -1

(x - 5)² + (y - 5)² - 50 = -1

(x - 5)² + (y - 5)² = 49

x = 5, y = 5

Therefore your answer is (5,5).

The radius is also the square root of whatever the equation is equal to (root 49 = 7).


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