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Earn +20 ptsQ: What is the square root of 21?
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Continue Learning about Algebra
Is negative square root of 21 irrational?
Yes, as is the positive square root.
What is the simplest radical from of the square root of 84?
First note that 84=4x21 and 4 is a perfect square. So square root of (84)=square root (4x21)=Square root (4) Square root (21)= 2 multiplied by the square root of 21. You can also write this using rational exponents, but this is not in radical form. It is an equivalent expression, however. 2 x (21)1/2
The square root of 441?
21
What is the square root of 84 simplify?
It is: 2 times the square root of 21 and it's an irrational number
Square root of 441?
plus or minus 21
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