For any real number √a²
a
- |al
lal.
-a

|a|

Step-by-step explanation:

For any positive or negative a, when you square it, the answer is positive.

The square root symbol means the principal square root. For a positive number, the principal square root is positive. To make sure the square root is always non-negative, use absolute value.

|a|

2

Step-by-step explanation:

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