Editor
If domain of a function $f(x)=x^{2}$ is {$1,-1,0,2,-2$}, find its range
Difficulty: Easy
A: 
{$1,0,4$}
B: 
{$1,0,-4$}
C: 
{$1,1,0,4,4$}
D: 
{$1,1,0,-4,-4$}
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