Question 164411
{{{(1-x^2)/(1+x^2)^2=0}}}
The equation equals zero when the numerator equals zero.
{{{(1-x^2)=0}}}
{{{x^2=1}}}
{{{x=0 +- 1}}}
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{{{ graph( 300, 300, -5, 5, -2, 2, (1-x^2)/((1+x^2)))^2 }}}