what is the center and radius of the circle if the equation x² + y² – 8x – 9 = 0 is graph on a coordinate plane?
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what is the center and radius of the circle if the equation x² + y² – 8x – 9 = 0 is graph on a coordinate plane?
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Answer:
x²+y²+8x-9=0
x²+x+16-16+y²+8x-9=0
(x+4)²+y²-25=0
(x+4)²+y²-25+25=o n+25
(x+4)²+y²=25
center(-4,0)
radius:5