Assuming you are trying to find what kind of figure this represents, also that this = 0,
x^2 -4x + y^2 +12y =20 Completing the square for both x and y, x^2 -4x +4 + y^2 +12y +36=20 + 4 + 36 = 60 (x-2)^2 + (y+6)^2 = 60 is a circle with center at (-2,6) with a radius of the square root of 60 or 2SQRT(15)
First, replace the numerator with the parentheses. Second, multiply both sides by 3. Third, multiply 2 × 3 to get 6. Fourth, take away 15 from each side. Fifth, simplify -6 - 15 to get -21.
