Question 1054667
{{{y=abs(x^2-4)}}}
So,
{{{y=x^2-4}}} when {{{x^2-4>=0}}}
{{{x^2>4}}} when {{{x>2}}} and {{{x<-2}}}
and
{{{y=-(x^2-4)}}} when {{{x^2-4<0}}}
{{{y=4-x^2}}} when {{{-2<x<2}}}
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*[illustration fcd3.JPG].