Question 186699
2x(x/2) – 2x(x) + 2x(2/x) – 5(2x) = 0
x2  - 2x2 + 4 – 10x = 0;   - x2 – 10x +4 =0
multiplying with – 1 we get x2 + 10x -  4 = 0
comparing with the general quadratic equation ax2+bx+c=0 
we have a = 1 , b = 10 , c = - 4

x = (- 10 +√(100+16)/2  or (- 10 - √(100+16)/2  
   = - 5 + √29    and  - 5 -  √29    



If you still need any clarifications please write to me : udayakumar.t.r@gmail.com