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Question

Write the lowest rationalising factor of :
32+2332+23 is

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Solution

The lowest rationalizing factor be of the type a3+b2;(32+23)(a3+b2)=32b+23a+2b6+3a6.
To be rational, 2b6=3a6;3a=2b;
For the least value of rationalizing factor, a=2,b=3;i.e,2332


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