A circle in the xy-plane has center (5, 7) and radius 2. Which of the following is an equation of the circle?
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Answer:
x²+y²-10x-14y+70 = 0
Step-by-step explanation:
Centre (5,7) = (a,b)
Radius = 2 = r
Equation of circle : (x-a)² + (y-b)² = r²
(x-5)²+(y-7)² = 2²
x²+25-10x + y²+49-14y = 4
x²+y²-10x-14y+70 = 0
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