I do not think it is wrong, I think I did not understand the question and solved another problem.

Your answer leads to this:

Is that what they wanted?

]]>Had found a different solution. It is

Thus we can take y as 2 and z as 1

]]>which is just a basic manipulation of your problem. x can be found by numerical computation to as many digits as we need. But there is no closed form for x in terms of known constants that I can discover. But there are simple forms for y and z as I have posted.

]]>is a root and I believe the only real root.

]]>Are we talking about this one?

]]>your 1st answer is now correct. Yes you told right that we always rationalize the denominator... but still 1/√5 is more simpler... we rationalize the denominator when we have a fraction whose numerator or denominator is composed of more than 1 term. Example will be written as . But I think that 1/√5 is more simpler than √5/5.

Your 2nd answer(answer of the 4th question) is wrong. Take x as 1 and then see it would not be matching.

]]>]]>

Your 1 st answer is correct but you need to simplify the fraction.

]]>Do I use this expression

for all the questions?]]>Have you seen the post? Long time no reply. Are you not able to solve these problems... If you want I may tell you the solutions... I am waiting for your reply and then will send you the difficult problems of other questions also... If you want I may send you the problems of other questions also. Please reply.

]]>And yeah you have to simplify the following.

]]>