1.

`(7+3sqrt(5))(7-3sqrt(5))` का वर्गमूल क्या है?A. `4`B. `sqrt(5)`C. `3sqrt(5)`D. `2`

Answer» Correct Answer - D
According to the question
`impliessqrt((7+3sqrt(5))(7-3sqrt(5)))`
`implies sqrt(49-45)impliessqrt(4)=2`


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