Mister Exam

9x2+4y2-36x+16y+16=0. canonical form

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16 - 36*x + 4*y2 + 9*x2 + 16*y = 0
$$- 36 x + 9 x_{2} + 16 y + 4 y_{2} + 16 = 0$$
-36*x + 9*x2 + 16*y + 4*y2 + 16 = 0