SOLUTION: Find the center of a circle with the equation x2 + y2 + 2x + 4y – 9 = 0.
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Question 322575: Find the center of a circle with the equation x2 + y2 + 2x + 4y – 9 = 0.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Complete the square in x and y,
Compare to the general equation of a circle centered at (h,k) with radius R,
.
.
.
(h,k)=(-1,-2)
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