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Which exspression results in a rational number ? 1. √(121 ) - √(21) 2. √(25) * √(50) 3. √(36) / √(225) 4. 3 √(5) + 2 √(5) ​
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Which exspression results in a rational number ?

1.

√(121 ) - √(21)
2.

√(25) * √(50)
3.

√(36) / √(225)
4.

3 √(5) + 2 √(5)
​

User AkselA
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1 Answer

4 votes
3) since root(36)=6 and root(225)=15 so 6 divided by 15 is 2/5 (0.4) which is a rational number
User Olegtaranenko
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