Question

if X^2 + 1/X^2=23, evaluate x+1/x​

Answer 1

Answer:

±5

Step-by-step explanation:

$x^{2} + \frac{1}{x^{2} } + 2 = (x + \frac{1}{x} ) ^{2}$

x+1/x = √(23+2)

= √25 = ±5

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