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Earn +20 ptsQ: Is the square root of 5 and squa re root of 21 irrational?
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Is the square root of 21 an irrational or a rational number?
irrational
Is the square root of 84 a rational number?
No because it is 2 times the square root of 21 which is an irrational numberThe square root of 84 is not a rational number
Is the square root of 21 a real number?
Yes, albeit an irrational number
Is the square root of eighteen an irrational number?
Yes. It would be 21/2 * 91/2, or "three root two". Root two is an irrational number, so it's products - such as root 18, will be as well.
Is 4.5 the square root of 21?
4.6 is a better approximation to the square root of 21.
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