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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.
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Earn +20 ptsQ: How do you find the square root of 21?
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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.
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