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Verified answer
Jawabpersmaan linghkaran P(a,b) dengan r
(x - a)² + (y-b)² = r²
a)P(0,4) , r = 7
(x - 0)² + (y - 4)² = 7²
x² + (y - 4)² = 49
atau
x² + y² -8y + 16 - 49 = 0
x² + y² - 8y - 33 = 0
2)
P(10, 0) , r = 5
( x- 10)² + (y - 0)² = 5²
(x -10)² + y² = 25
atau
x²- 20x + 100 + y² - 25 =0
x² + y² - 20x + 75 = 0