if 4+√7/2√7+5=a+b√7 find value of a and b
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(√7+√5/√7-√5) -(√7-√5/√7+√5)=a+√35b
(7+√5)^2-(√7-√5)^2/(7+√5/√7-√5) =a+√35b
7+5+2√35 -7-5+2√35/7-5 =a+√35b
4√35/2 =a+√35b
0+2√35 =a+√35b
on comparing we get
a=0
b=2
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