If, by "3 radical 27" you mean the cuberoot of 27, the answer is YES.
If you mean 3 times sqrt(27), the answer is NO.
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No. Radical(9) is +3 or -3, both of which are rational.
Radical(27) can be simplified to 3*radical(3), so the correct answer is 6*radical(3).
3 sqrt (3)Put the radical where the "sqrt" is with the second 3 inside.
You can represent a radical with a rational exponent. For example the nth root of a number m can be written as m1/n . If n was 2 for example, then it is the square root. So square root of 3 or radical 3 is written sqrt(3) or 31/2 .
How about 27 whose cube root is 3 which is a rational whole number.