The equation of the circle shown in the following diagram can be written as x^2 + Ay^2 + Bx + Cy + D = 0. Find A + B + C + D.
+37157 Center at -1,1
(x+1)^2 + (y-1)^2 = r^2 r^2 = distance between center and the point on the circumf r^2 = ( 3^2 + 2^2) = 13
(x+1)^2 + ( y-1)^2 = 13 expand to get to the form requested ....
x^2 + 2x + 1 + y^2 -2y + 1 - 13 = 0
x^2 + 2x + y^2 - 2y -11 = 0 <========= take if from here !
+37157 Center at -1,1
(x+1)^2 + (y-1)^2 = r^2 r^2 = distance between center and the point on the circumf r^2 = ( 3^2 + 2^2) = 13
(x+1)^2 + ( y-1)^2 = 13 expand to get to the form requested ....
x^2 + 2x + 1 + y^2 -2y + 1 - 13 = 0
x^2 + 2x + y^2 - 2y -11 = 0 <========= take if from here !
