Question

What is the answer to this be
-1 ≤ x ≤ 1
-1 ≤ x ≥ 1

Answer 1

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Explanation:

Answer 2

Explanation:

1-x²≥0

1≥x²

or x²≤ 1

-1≤x≤1

[if x²≤a,then -a ≤x≤a]