If x-1-x-5- then the value x2-1-x2 isA- 0B- 47C- 23D- 6

The correct option is C 23a^2+b^2=(a+b)^2 2ab x^2+1/x^2 =(x+1/x)^2 2× x×1/x=5^2 2=23 ...

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Algebraic Identities

If x+1/x=5, t...

Question

If $x + \frac{1}{x} = 5,$ then the value $x^{2} + \frac{1}{x^{2}}$ is

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If $(x + \frac{1}{x}) = 5$ , then $(x^{2} + \frac{1}{x^{2}}) = ?$
(a) $25$
(b) $27$
(c) $23$
(d) $25 \frac{1}{25}$

x + \frac{1}{x} = 20

x^{2} + \frac{1}{x^{2}}

\frac{1 - x + x^{2}}{1 + x + x^{2}}

If x =2, y = -1, then the value of $x^{2} + 4 x y + 4 y^{2}$ is

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