in my micro-economics class my tutor solved a problem for us. There was a particular step which I didn't quite understand. How did he manage to transform this equation:
into this one:
What are the computation steps inside the square root which he performed in order to bring "L - the fration^2 * x^2" to the same denominator?
Thank you very much in advance!
Have you written them down correctly? These two functions are clearly not equivalent. For example:
You are right. I'm sorry, I made a mistake... the first equation should be (a "+" not a "-" there):
Then that means, that he only brought the "L - (the big fraction)^2 * X^2" to the same denominator resulting in:
and then he simplified the "L^2" and the "(Sqrt(L)+Sqrt(K))^2" inside of the big sqare root with the fraction outside of the square root thus resulting in:
Does this make sense to you?