Question

To find the general equation of circle

Answer 1

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Answer 2

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• We know that the general equation for a circle is ( x - h )^2 + ( y - k )^2 = r^2, where ( h, k ) is the center and r is the radius.
• So add 21 to both sides to get the constant term to the righthand side of the equation.
• Then complete the square for the y terms.