sqrt(20)
factor under the radical
sqrt(22 * 5)
bring out the 2 as it is squared
2sqrt(5)
========simplest form
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That IS the simplest radical form.
3 square root 10
the square root of 164= 2x the square root of 41
The square root of 28 or in this case the radical form of 28 will be 2 times radical 7. Since 28 is 4 times 7 and the square root of 4 is two.
4√2