I'm guessing that there is no restriction because the expression is positive? I'd appreciate any steps for clear understanding

Thanks in advance

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I'm guessing that there is no restriction because the expression is positive? I'd appreciate any steps for clear understanding

Thanks in advance

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Assuming that the expression is sqrt(90 x^{2}),

the usual mixed radical form is 3 x sqrt(10)

For this form the restriction is x ≥ 0. The entire and mixed expressions do not evaluate to the same value if x is negative.

However, we can also write the mixed radical as 3 |x| sqrt(10) . Written this way there is no restriction.

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