Rationalise the denominator x=3-2root2 find x square +1/ x square , x cube +1/x cube
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Hi Mate !!
x = 3 - 2√2
[ Using identity :- ( a + b ) ( a - b ) = a² - b² in denominator ]
Now ,
[ Using identity : ( a + b )² = a² + b² + 2ab ]
___________________
Now ,
[ Using identity : ( a + b )³ = a³ + b³ + 3ab ( a + b ) ]
Hence ,
x = 3 - 2√2
[ Using identity :- ( a + b ) ( a - b ) = a² - b² in denominator ]
Now ,
[ Using identity : ( a + b )² = a² + b² + 2ab ]
___________________
Now ,
[ Using identity : ( a + b )³ = a³ + b³ + 3ab ( a + b ) ]
Hence ,
musku425:
Thanxs bhai
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