Question

by rationalising the denominator find the value of the two significant figures​

Answer 1

Answer:

Step-by-step explanation:

     1    

  3-√2

=     1     × 3+√2          (As 3+√2  will cancel out and leave 1)

   3-√2    3+√2                 3+√2

= 3+√2

  3²-(√2)²   {as  3-√2    3+√2 are in the form of [a+b]×[a-b] so it became     a²-b² }

=3+√2

 9-2  

=3+√2  

    7

7 is a rational number so the denominator is rationalised.

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