Question

if x is equal to 2 - root 3 find the value of x-1/x ​

Answer 1

x=2-√3

1/x=1/2-√3

rationslising the denominator we have 1/x=(2+√3)/(2-√3)(2+√3)

=(2+√3)/(2^2-√3^2)

since( a+b)(a-b) =a^2-b^2

therefore

1/x=(2+√3)/4-3=2+√3

x-1/x=2-√3-(2+√3)

=2-√3-2-√3=-2√3

Answer 2

Here is ur answer

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