Question

How do you simplify `sqrt (x^4)`?

Answer 1

`+-x^2`

Explanation:

`a^(1/N)` has N values that are the roots of `a^N=1`

The roots might include complex values that occur in conjugate pairs.

Very briefly, `sqrt1=+-1`.
`sqrt(x^4) = (x^4)^(1/2)` has two values `+-x^2`.
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