Question

If X=(4-√15), find the value of x2 +1/x2​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

2

Step-by-step explanation:

${x}^{2} = {(4 - \sqrt{15}) }^{2} \\ {4}^{2} - {15 }^{2} \\ 16 - 15 = 1 \\ \frac{1}{ {x}^{2} } = \frac{1}{1} = 1 \\ {x}^{2} + \frac{1}{ {x}^{2} } = 1 + 1 = 2$

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