SOLUTION: {{{2n/n-1 + n-5/n^2-1=1}}} I am so confused, when i start the problem i know how to find the lowest common denominator but after that i get very lost. thanks for the he

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: {{{2n/n-1 + n-5/n^2-1=1}}} I am so confused, when i start the problem i know how to find the lowest common denominator but after that i get very lost. thanks for the he      Log On


   

Question 300539: 2n%2Fn-1++%2B+++++n-5%2Fn%5E2-1=1
I am so confused, when i start the problem i know how to find the lowest common denominator but after that i get very lost.
thanks for the help
i appreciate it
Answer by dabanfield(803) About Me  (Show Source):
You can put this solution on YOUR website!
2n%2Fn-1++%2B+++++n-5%2Fn%5E2-1=1

2n/n -1 + n - 5/n^2 - 1 = 1
2 - 1 + n -5/n^2 - 1 = 1
1 + n - 5/n^2 - 1 = 1
n - 5/n^2 = 1
Multiply both sides by n^2:
n^3 - 5 = n^2
n^3 - n^2 - 5 = 0
This is not simple to solve. Are you sure the orginal problem is correctly stated? Paranetheses are critical here. :)