SOLUTION: How to solve the fractional equation: If (1/1-x)+(1/1+x)=4 then x4 = what?

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Question 844318: How to solve the fractional equation:
If (1/1-x)+(1/1+x)=4 then x4 = what?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

1%2F%281-x%29%2B1%2F%281%2Bx%29=4+   |Multiply thru by%281-x%29%281%2Bx%29so as all denominators = 1

 (1+x)  + (1-x) = 4(1-x^2)

2 = 4-4x^2)

 4x^2 = 2

  x^2 = 1/2

  x^4 = 1/4