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Question
Write the lowest rationalising factor of : 3√2 + 2√3
Solution
3√2 + 2√3
= ( 3√2 + 2√3 )( 3√2 - 2√3 )
= ( 3√2)2 - (2√3)2
= 9 x 2 - 4 x 3
= 18 - 12
= 6
its lowest rationalizing factor is 3√2 - 2√3.
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