0
21 is not a perfect square, and none of its factors (1, 3, 7, 21) are perfect squares either, so √21 is already simplified. The easiest way to compute an approximate value is using a calculator; if you are familiar with calculus, Newton's method works to find an approximation manually. Either way, it is approximately equal to 4.58258.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
How do you find square root of square 21?
The square root and square functions are inverse of one another EXCEPT that square root is not really a function: it is a 1-to-many mapping. So sqrt(square(21)) = sqrt(441) = ±21
Is 4.5 the square root of 21?
4.6 is a better approximation to the square root of 21.
What is the exact value for the expression the square root of 189 minus the square root of 21 plus the square root of 84 Simplify if possible.?
21
What is the principle square root of 49 over 21 squared?
(√(a))²=a The square root and the square cancel to leave just 49/21■
How do you simplify the square root of 2205?
21 times the square root of 5.
What is the square root of 21?
The square root of 21 is 4.58257569495584.
How do you find square root of square 21?
The square root and square functions are inverse of one another EXCEPT that square root is not really a function: it is a 1-to-many mapping. So sqrt(square(21)) = sqrt(441) = ±21
Square root of 21?
The square root of 21 is 4.58257569495584.
Is 4.5 the square root of 21?
4.6 is a better approximation to the square root of 21.
What is the exact value for the expression the square root of 189 minus the square root of 21 plus the square root of 84 Simplify if possible.?
21
Multiply negative root 8 4 and 6 plus root 6 4?
Root 64 is 8, if by root you mean the square root. Then the problem become -square root 84(6+8) which is the - square root of 84(14) But square root of 84 is 2(square root of 21) so the final answer comes from -2(square root 21)x14 which is -28square root (21)
What is the square root of 441?
21The square root of 441 is 21
What is the square root of 21 Times Square root 15?
Your answer is: 17.7482393
What is the principle square root of 49 over 21 squared?
(√(a))²=a The square root and the square cancel to leave just 49/21■
Is negative square root of 21 irrational?
Yes, as is the positive square root.
How do you simplify the square root of 2205?
21 times the square root of 5.
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
