Mister Exam

52x2+73y2+72xy−100=0 canonical form

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-100 + 52*x2 + 73*y2 + 72*x*y = 0
$$72 x y + 52 x_{2} + 73 y_{2} - 100 = 0$$
72*x*y + 52*x2 + 73*y2 - 100 = 0