Without further information, the only inequality is x2 ≥ 0 (assuming x is real).
In the complex domain, there is no inequality.
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x2≤64
-6
the answer is -8<x<8.
x2 = 16take the root square for both sides the result will be :X = +4 or -4
x2 ≥ 0 is one possible answer.