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If $x-\frac{2}{x}=15$, then what is the value of $\left(x^2+\frac{4}{x^2}\right) ?$ |
229 227 221 223 |
229 |
If $K-\frac{1}{K}=n$ then, $K^2-\frac{1}{K^2}$ = n2 + 2 If $x-\frac{2}{x}=15$ Then, $\left(x^2+\frac{4}{x^2}\right) ?$ = 152 + 2 × 2 = 229
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