SOLUTION: Find the center of a circle with the equation x2 + y2 + 2x + 4y

SOLUTION: Find the center of a circle with the equation x2 + y2 + 2x + 4y - 9 = 0

Question 153708: Find the center of a circle with the equation x2 + y2 + 2x + 4y - 9 = 0
Answer by orca(409) (Show Source): You can put this solution on YOUR website!
Note that the equation of a circle in standard form is

where (a,b) is the center of the circle, r is the radius.
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First write the equation in standard form. Steps are as follows.

So the center is (-1,-2).
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