Question

Please some one answer..

Answer 1

put the value of x in the equation

$(( \sqrt{5} - 2) +\frac{1}{( \sqrt{5} - 2) } ) ^{ 3}$
now put the formula of
$(a + b) {}^{3}$
you just have to put
$a = \sqrt{5} - 2 \\ and \: b = \ \frac{1}{ \sqrt{5} - 2}$
you will get your answer