Drag the tiles to the boxes to form correct pairs.
Not all tiles will be used.
Match the pairs of equations that represent concentric circles.

3x2 + 3y? + 12x- 6y - 21 = 0
5x2 + 5y2 - 10x + 40y - 75 = 0
5x2 + 5y2 - 30x + 20y - 10 = 0
4x2 + 4y2 + 16x- 8y - 308 = 0
x2 + y2 - 12x-8y - 100 =0
2x2 + 2y? - 8x + 12y - 40 =0
4x2 + 4y? - 16x + 24y - 28 = C
3x2 + 3y2 - 18x + 12y - 81 = 0
x2 + y2- 2x+ 8y - 13=0
x2 + y2 + 24x + 30y + 17 =0