equation 2x² + 2y² + 6x-10y-1 = 0 is a circle equation with center ..? and r ..?
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Answer:
Step-by-step explanation:
(3/2,-5/2) is center and radius is 3
Answered by
1
Step-by-step explanation:
x² + y² + 3x - 5y - 1/2 = 0
Comparing from Circle's equation ,
2g = 3 , g = 3/2
2f = -5 , f = -5/2
c = -1/2
Centre C = (-g , -f ) = (-3/2 , 5/2 )
r = √g² + f² - c = √(9/4)+(25/4)+1/2
=√(9+25+2)/4 = √9 = 3
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