Question

Answer
1.If x=$x=\frac{1}{\sqrt{5}- 2}$,find the value of $x^{3}-3x^{2}-5x+3$
2.If a= $\frac{3+\sqrt{7}}{2}$,then find the value of $a^{2} + \frac{1}{a^{2} }$
3.Rationalise: $\frac{5}{4\sqrt{3}-3\sqrt{2}}$
4.heck whether $(3-\sqrt{7})^{2}$ is an irrational number.

Answer 1

VERY DIFFICULT QUESTION!!!!