Question

.Rationalise 1 / 2+ √3 + 7

Answer 1

Ello!!

Here's your answer

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1 / ( 2 + √ 3 + 7 )

= 1 / ( 9 + √ 3 )

= ( 9 - √ 3 ) / ( 9 + √3 ) ( 9 - √3 )

= ( 9 - √3 ) / ( 9 )^2 - ( √3 )^2 [ °•° a^2 - b^2 = ( a + b ) ( a - b ) ]

= ( 9 - √3 ) / 81 - 3

= ( 9 - √3 ) / 78

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Hope it helps you dear!!

Answer 2

Hello Here's your answer  _______________________  1 / ( 2 + √ 3 + 7 )  = 1 / ( 9 + √ 3 )  = ( 9 - √ 3 ) / ( 9 + √3 ) ( 9 - √3 )  = ( 9 - √3 ) / ( 9 )^2 - ( √3 )^2 [ °•° a^2 - b^2 = ( a + b ) ( a - b ) ]  = ( 9 - √3 ) / 81 - 3  = ( 9 - √3 ) / 78  I hope it will help you dear