Precalculus Examples

$\frac{9}{x^{2}} - \frac{4}{y^{2}} + 7 = 0$ , $\frac{4}{x^{2}} + \frac{1}{y^{2}} = 8$

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$\frac{9}{x^{2}} - \frac{4}{y^{2}} + 7 = 0, \frac{4}{x^{2}} + \frac{1}{y^{2}} = 8$