Question 46880
 
    
  {{{(4-sqrt(7))(3+2sqrt(7))}}}
 
=  {{{12+8sqrt(7)-3sqrt(7)-14}}} ...   ....  (applying distributive law)
 
=  {{{12-14+8sqrt(7)-3sqrt(7)}}}
  
=  {{{-2+5sqrt(7)}}}  Answer.  
  
 
gsm