Question

pleae answer this question​

Answer 1

Step-by-step explanation:

$(a - b) {}^{2} = a {}^{2} + b {}^{2} - 2ab \\ x {}^{2} - \frac{1}{x {}^{2} } = 66 \\(x - \frac{1}{x} ) {}^{2} + 2 = 66 \\ (x - \frac{1}{x} ) {}^{2} = 66 - 2 \\ (x - \frac{1}{x} ) {}^{2} = 64 \\ x - \frac{1}{x } = \sqrt{64} \\ x - \frac{1}{x } = + or - 8$

Answer 2

Answer:

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