Question

$if x - \frac{1}{x} = 7, then find the value of x^{2} +x \frac{1}{x^{2} }$

Answer 1

Step-by-step explanation:

The digit of a two digit number differ by 3. The digit are interchanged and the resulting number is added to the original number we get 143. Hence, the original number is 85.

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