Q. 865.0( 2 Votes )

If both of a</em

Answer :

(i)   -1 is the conjugate surd of  +1
   
   
       
        
         2 - a + b 
      Hence, a = 2 ,  b = -1 

 (ii)  is the conjugate of 3-

=
=
=
On comparing both sides
         
We have a =  and b =
 (iii) 7-4 is the conjugate of 7 + 4
            ∴      
                  =    
                                   = 
                               = 35 -20
On comparing both sides
        
11-6
We have,   a = 11,  b = -6.
(iv)  is the conjugate of the denominator 3𢆢 - 2𢆣

                                 =
                         =
                         = 2 +
On comparing both sides
       2 +
we have,   a = 2 and b = -

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