If x 2 -5x-1-0- then find the value of x 2 - 1 x 2

The correct option is D 27 According to question, x^2 5x 1=0 x^2 1=5x x 1x=5 Squaring both sides we get, (x 1x)^2=25 x^2+1x^2 2=25 ...

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Expansion of (x^2 - y^2)

If x 2 -5x-...

Question

If $x^{2} - 5 x - 1 = 0$ , then find the value of $x^{2} + \frac{1}{x^{2}}$

23

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Solution

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