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Mathematics, 04.04.2021 18:00 sullivanjakob

Please help with this question! If $x+\frac{1}{x} = a, y-\frac{1}{y} = b, a^{2} + b^{2} = 4$ , what is $\frac{y}{x} - \frac{x}{y}$ in terms of a and b? ( $x^{2} \neq y^{2}$ )

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