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प्रश्न
Write the lowest rationalising factor of : 7 - √7
बेरीज
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उत्तर
7 - √7
( 7 - √7 )( 7 + √7 ) = 49 - 7 = 42
Therefore, lowest rationalizing factor is ( 7 + √7 ).
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Rationalisation of Surds
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