find a and b if (2 root 5 + 3)/(2root 5 - 3) =a +b root 5
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(2√5+3) /(2√5-3) =a+b√5
(2√5+3) ^2/11=a+b√5
29+12√5/11=a+b√5
a=29/11 , b=12/11
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