solve and check your answer. Please check this for me to see if I have the right answer.

__2__ = __3__
1-x 1+x

x= 1/5

It's not clear what you are asking. If you are dividing 2 by quantity [(1-x)*(1+x)], then your answer is sqrt3/3; where x does not equal 1 or -1 (that would induce division by 0).