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Question
Classify the given pair of surds into like surd and unlike surd.
`4 sqrt 18 , 7 sqrt 2`
Solution
Since, `4 sqrt 18 = 4 sqrt (9 xx 2)`
`= 4 xx 3 sqrt 2`
`= 12 sqrt2`
So, `4 sqrt 18 , 7 sqrt 2` is like surds.
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