\( x^2 + y^2 + 4y + 13 = 6x \) 2) \( x^2 + y^2 + 17 = 2x - 8y \) 3) \( 4x^2 + 9y^2 + 2 = 4x + 6y \) 4) \( 9x^2 + 4y^2 + 26 + 4y = 30x \)

tìm số x,y,z thỏa mãn
gấpp
----- Nội dung ảnh -----
1) \( x^2 + y^2 + 4y + 13 = 6x \)

2) \( x^2 + y^2 + 17 = 2x - 8y \)

3) \( 4x^2 + 9y^2 + 2 = 4x + 6y \)

4) \( 9x^2 + 4y^2 + 26 + 4y = 30x \)