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Question

Simplify the following by rationalising the denominator 6436+43.

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Solution

6​-4√3
6+4√3
By rationalizing above expression
= 6​-4√3 × 6​-4√3
6+4√3 6​-4√3

=6436+43×643643

= 36 + 48 - 48√3
36 - 48

= 84 - 48√3
-12

= 12(7-4​√3)
-12

= -​7+4​√3
​1


Hence, 6436+43= ​4​​√3-7


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