✓21+(-✓21 is a ___ number
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Answer:
>3 make me brilliant list
Step-by-step explanation:
Rational number
(3+√21) - √21 is a/ an rational number.
Solution:
= > (3 + \sqrt{21} ) - \sqrt{21}=>(3+
21
)−
21
Removing the brackets:
= > 3 + \sqrt{21} - \sqrt{21}=>3+
21
−
21
= > 3=>3
Now, 3 is a rational number since it can be written in the form of p/q ,i.e.,3/1 where 3 and 1 are integers and q,i.e.,1 is not zero.
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