c = (a-b) , r =a+b
Find the equation of the circles with centre c and radius r where
Question
c = (a-b) , r =a+b
Find the equation of the circles with centre c and radius r where
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Mathematics
11 months
2021-07-05T03:59:57+00:00
2021-07-05T03:59:57+00:00 1 Answers
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Answer:
we know the equation of circle is:
(x-h)²+(y-k)² = r²
given (h,k) = (a,b)
and r = a+b
so, equation; (x-a)²+(y-b)²=(a+b)²
=> x²-2ax+a²+y²-2by+b² = a²+2ab+b²
=> x²+y²-2ax-2by-2ab = 0