Question

if u will solve I will give u surprise​

Answer 1

$Question:$

If $x^{2}+\frac{1}{x^{2} }=51$ ,

Then $(x-\frac{1}{x}) = ?$

$Solution:$

We know that ,

$(x-\frac{1}{x}) ^{2} = x^{2} +\frac{1}{x^{2} } -2*x*\frac{1}{x} \\\\=> (x-\frac{1}{x}) ^{2} = 51-2\\\\=>(x-\frac{1}{x}) ^{2} = 49\\\\So (x-\frac{1}{x}) = 7.$

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